public static IFIDSet FindVersionDifferences(IWorkspace workspace, String sourceVersionName, String targetVersionName, String tableName, esriDifferenceType differenceType)
        {
            // Get references to the child and parent versions.
            IVersionedWorkspace versionedWorkspace = (IVersionedWorkspace)workspace;
            IVersion            sourceVersion      = versionedWorkspace.FindVersion(sourceVersionName);
            IVersion            targetVersion      = versionedWorkspace.FindVersion(targetVersionName);

            // Cast to the IVersion2 interface to find the common ancestor.
            IVersion2 sourceVersion2        = (IVersion2)sourceVersion;
            IVersion  commonAncestorVersion = sourceVersion2.GetCommonAncestor(targetVersion);

            // Cast the child version to IFeatureWorkspace and open the table.
            IFeatureWorkspace targetFWS   = (IFeatureWorkspace)sourceVersion;
            ITable            targetTable = targetFWS.OpenTable(tableName);

            // Cast the common ancestor version to IFeatureWorkspace and open the table.
            IFeatureWorkspace commonAncestorFWS   = (IFeatureWorkspace)commonAncestorVersion;
            ITable            commonAncestorTable = commonAncestorFWS.OpenTable(tableName);

            // Cast to the IVersionedTable interface to create a difference cursor.
            IVersionedTable   versionedTable   = (IVersionedTable)targetTable;
            IDifferenceCursor differenceCursor = versionedTable.Differences(commonAncestorTable, differenceType, null);

            // Create output variables for the IDifferenceCursor.Next method and a FID set.
            IFIDSet fidSet        = new FIDSetClass();
            IRow    differenceRow = null;
            int     objectID      = -1;

            // Step through the cursor, showing the ID of each modified row.
            differenceCursor.Next(out objectID, out differenceRow);
            while (objectID != -1)
            {
                fidSet.Add(objectID);
                differenceCursor.Next(out objectID, out differenceRow);
            }

            fidSet.Reset();
            return(fidSet);
        }
        protected override void OnMouseDown(MouseEventArgs arg)
        {
            IFeatureLayer pPointLayer     = null;
            IFeatureLayer pLineLayer      = null;
            IArray        pParcelLayers   = null;
            IFeatureLayer pControlLayer   = null;
            IFeatureLayer pLinePointLayer = null;

            double         dXYTol      = 0.003;
            clsFabricUtils FabricUTILS = new clsFabricUtils();
            IEditor        pEd         = (IEditor)ArcMap.Application.FindExtensionByName("esri object editor");

            //first get the extension
            UID pUID = new UIDClass();

            pUID.Value = "{114D685F-99B7-4B63-B09F-6D1A41A4DDC1}";
            ICadastralExtensionManager2 pCadExtMan = (ICadastralExtensionManager2)ArcMap.Application.FindExtensionByCLSID(pUID);
            ICadastralEditor            pCadEd     = (ICadastralEditor)ArcMap.Application.FindExtensionByCLSID(pUID);

            //check if there is a Manual Mode "modify" job active ===========
            ICadastralPacketManager pCadPacMan = (ICadastralPacketManager)pCadExtMan;

            if (pCadPacMan.PacketOpen)
            {
                FabricUTILS.ExecuteCommand(m_CommUID);
                MessageBox.Show("This tool cannot be used when there is an open parcel, construction, or job.\r\nPlease complete or discard the open items, and try again.");
                return;
            }

            ICadastralFabric pCadFabric = null;

            //if we're in an edit session then grab the target fabric
            if (pEd.EditState == esriEditState.esriStateEditing)
            {
                pCadFabric = pCadEd.CadastralFabric;
            }
            else
            {
                FabricUTILS.ExecuteCommand(m_CommUID);
                MessageBox.Show("This tool works on a parcel fabric in an edit session.\r\nPlease start editing and try again.");
                return;
            }

            if (pCadFabric == null)
            {//find the first fabric in the map
                if (!FabricUTILS.GetFabricFromMap(ArcMap.Document.ActiveView.FocusMap, out pCadFabric))
                {
                    FabricUTILS.ExecuteCommand(m_CommUID);
                    MessageBox.Show("No Parcel Fabric found in the map.\r\nPlease add a single fabric to the map, and try again.");
                    return;
                }
            }

            IGeoDataset pGeoDS = (IGeoDataset)pCadFabric;
            ISpatialReferenceTolerance pSpatRefTol = (ISpatialReferenceTolerance)pGeoDS.SpatialReference;

            if (pSpatRefTol.XYToleranceValid == esriSRToleranceEnum.esriSRToleranceOK)
            {
                dXYTol = pSpatRefTol.XYTolerance;
            }

            IMouseCursor          pMouseCursor        = null;
            ISpatialFilter        pSpatFilt           = null; //spatial filter query hinging off the dragged rectangle selection
            IQueryFilter          pQuFilter           = null; //used for the non-spatial query for radial lines, as they have no geometry
            IRubberBand2          pRubberRect         = null;
            IGeometryBag          pGeomBag            = null;
            ITopologicalOperator5 pUnionedPolyine     = null;
            IPolygon      pBufferedToolSelectGeometry = null;         //geometry used to search for parents
            IFIDSet       pLineFIDs            = null;                //the FIDSet used to collect the lines that'll be deleted
            IFIDSet       pPointFIDs           = null;                // the FIDSet used to collect the points that'll be deleted
            IFIDSet       pLinePointFIDs       = null;                // the FIDSet used to collect the line-points that'll be deleted
            List <int>    pDeletedLinesPoints  = new List <int>();    //list used to stage the ids for points that are referenced by lines
            List <int>    pUsedPoints          = new List <int>();    //list used to collect pointids that are referenced by existing lines
            List <int>    CtrPointIDList       = new List <int>();    //list for collecting the ids of center points
            List <int>    pParcelsList         = new List <int>();    //used only to avoid adding duplicates to IN clause string for, based on ties to radial lines
            List <int>    pOrphanPointsList    = new List <int>();    //list of orphan points defined from radial ines
            List <int>    pPointsInsideBoxList = new List <int>();    //list of parcels that exist and that intersect the drag-box
            List <string> sFromToPair          = new List <string>(); //list of from/to pairs for manging line points
            List <int>    pLineToParcelIDRef   = new List <int>();    //list of parcel id refs stored on lines

            IInvalidArea3 pInvArea = null;

            IFeatureClass pLines      = null;
            IFeatureClass pPoints     = null;
            IFeatureClass pParcels    = null;
            IFeatureClass pLinePoints = null;
            IWorkspace    pWS         = null;

            try
            {
                #region define the rubber envelope geometry
                pRubberRect = new RubberEnvelopeClass();
                IGeometry ToolSelectEnvelope = pRubberRect.TrackNew(ArcMap.Document.ActiveView.ScreenDisplay, null);

                if (ToolSelectEnvelope == null)
                {
                    return;
                }

                ISegmentCollection pSegmentColl = new PolygonClass();
                pSegmentColl.SetRectangle(ToolSelectEnvelope.Envelope);
                IPolygon ToolSelectGeometry = (IPolygon)pSegmentColl;

                if (pCadFabric == null)
                {
                    return;
                }

                pMouseCursor = new MouseCursorClass();
                pMouseCursor.SetCursor(2);

                #endregion

                FabricUTILS.GetFabricSubLayersFromFabric(ArcMap.Document.ActiveView.FocusMap, pCadFabric,
                                                         out pPointLayer, out pLineLayer, out pParcelLayers, out pControlLayer,
                                                         out pLinePointLayer);

                #region get tables and field indexes
                pLines      = (IFeatureClass)pCadFabric.get_CadastralTable(esriCadastralFabricTable.esriCFTLines);
                pPoints     = (IFeatureClass)pCadFabric.get_CadastralTable(esriCadastralFabricTable.esriCFTPoints);
                pParcels    = (IFeatureClass)pCadFabric.get_CadastralTable(esriCadastralFabricTable.esriCFTParcels);
                pLinePoints = (IFeatureClass)pCadFabric.get_CadastralTable(esriCadastralFabricTable.esriCFTLinePoints);
                string sPref = "";
                string sSuff = "";

                int iCtrPtFldIDX  = pLines.FindField("CENTERPOINTID");
                int iFromPtFldIDX = pLines.FindField("FROMPOINTID");
                int iToPtFldIDX   = pLines.FindField("TOPOINTID");
                int iCatFldIDX    = pLines.FindField("CATEGORY");
                int iParcelIDX    = pLines.FindField("PARCELID");
                int iDistanceIDX  = pLines.FindField("DISTANCE");


                pWS = pLines.FeatureDataset.Workspace;
                ISQLSyntax pSQLSyntax = (ISQLSyntax)pWS;
                sPref = pSQLSyntax.GetSpecialCharacter(esriSQLSpecialCharacters.esriSQL_DelimitedIdentifierPrefix);
                sSuff = pSQLSyntax.GetSpecialCharacter(esriSQLSpecialCharacters.esriSQL_DelimitedIdentifierSuffix);

                pSpatFilt            = new SpatialFilterClass();
                pSpatFilt.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
                pSpatFilt.Geometry   = ToolSelectGeometry;
                #endregion

                #region center point
                //need to make sure that center points are correctly handled for cases where the center point
                //is inside the select box, but the curve itself is not. The following is used to build an
                //IN CLAUSE for All the center points that are found within the tool's select geometry.
                int    iIsCtrPtIDX    = pPoints.FindField("CENTERPOINT");
                int    iCount         = 0;
                int    iCntCtrPoint   = 0;
                string sCtrPntIDList1 = "";

                IFeatureCursor pFeatCursPoints = pPoints.Search(pSpatFilt, false);
                IFeature       pFeat7          = pFeatCursPoints.NextFeature();
                while (pFeat7 != null)
                {
                    iCount++;
                    int    iVal     = -1;
                    object Attr_val = pFeat7.get_Value(iIsCtrPtIDX);

                    if (Attr_val != DBNull.Value)
                    {
                        iVal = Convert.ToInt32(pFeat7.get_Value(iIsCtrPtIDX));
                    }

                    if (iVal == 1)
                    {
                        if (sCtrPntIDList1.Trim() == "")
                        {
                            sCtrPntIDList1 += pFeat7.OID.ToString();
                        }
                        else
                        {
                            sCtrPntIDList1 += "," + pFeat7.OID.ToString();
                        }
                        iCntCtrPoint++;
                    }
                    pPointsInsideBoxList.Add(pFeat7.OID); //used to check for orphan linepoints
                    pOrphanPointsList.Add(pFeat7.OID);    //this gets whittled down till only "pure" orphan points remain
                    Marshal.ReleaseComObject(pFeat7);
                    pFeat7 = pFeatCursPoints.NextFeature();
                }
                Marshal.FinalReleaseComObject(pFeatCursPoints);
                #endregion

                #region create convex hull of lines
                //get the lines that intersect the search box and build a
                //polygon search geometry being the convex hull of those lines.
                IFeatureCursor pFeatCursLines = pLines.Search(pSpatFilt, false);
                pGeomBag = new GeometryBagClass();
                IGeometryCollection pGeomColl = (IGeometryCollection)pGeomBag;
                IFeature            pFeat1    = pFeatCursLines.NextFeature();
                m_sDebug = "Add lines to Geometry Collection.";
                string sParcelRefOnLines = "";
                object missing           = Type.Missing;
                while (pFeat1 != null)
                {
                    int    iVal    = (int)pFeat1.get_Value(iFromPtFldIDX);
                    string sFromTo = iVal.ToString() + ":";

                    if (pOrphanPointsList.Contains(iVal)) //Does this need to be done...will remove fail if it's not there?
                    {
                        pOrphanPointsList.Remove(iVal);   //does this need to be in the if block?
                    }
                    iVal     = (int)pFeat1.get_Value(iToPtFldIDX);
                    sFromTo += iVal.ToString();
                    if (pOrphanPointsList.Contains(iVal))
                    {
                        pOrphanPointsList.Remove(iVal);
                    }

                    sFromToPair.Add(sFromTo);
                    pGeomColl.AddGeometry(pFeat1.ShapeCopy, missing, missing);

                    if (sParcelRefOnLines.Trim() == "")
                    {
                        sParcelRefOnLines = pFeat1.get_Value(iParcelIDX).ToString();
                    }
                    else
                    {
                        sParcelRefOnLines += "," + pFeat1.get_Value(iParcelIDX).ToString();
                    }

                    Marshal.ReleaseComObject(pFeat1);
                    pFeat1 = pFeatCursLines.NextFeature();
                }
                Marshal.FinalReleaseComObject(pFeatCursLines);

                #endregion

                #region Add Center Points for curves outside map extent

                if (iCntCtrPoint > 999)
                {
                    throw new InvalidOperationException("The Delete Orphans tool works with smaller amounts of data." + Environment.NewLine +
                                                        "Please try again, by selecting fewer fabric lines and points. (More than 1000 center points returned.)");
                }

                //If there is no line geometry found, and there are also no points found, then nothing to do...
                if (pGeomColl.GeometryCount == 0 && iCount == 0)
                {
                    return;
                }

                //Radial lines have no geometry so there is a special treatment for those;
                //that special treatment takes two forms,
                //1. if a circular arc is selected and it turns out that it is an orphan line, then we
                //need to take down its radial lines, and its center point as well.
                //2. if a center point is selected, we need to check if it's an orphan, by searching for its parent.
                //The parent parcel can easily be well beyond the query rectangle, so the original
                //search rectangle is buffered by the largest found radius distance, to make sure that all
                //parent parcels are "find-able."

                //The radial lines themselves are also needed; Get the radial lines from the Center Points
                //CtrPt is always TO point, so find lines CATEGORY = 4 AND TOPOINT IN ()
                string sRadialLineListParcelID = "";
                string sRadialLinesID          = "";
                string sRadialLinePoints       = "";

                double dRadiusBuff = 0;
                pQuFilter = new QueryFilterClass();
                //Find all the radial lines based on the search query
                if (sCtrPntIDList1.Trim() != "")
                {
                    pQuFilter.WhereClause = "CATEGORY = 4 AND TOPOINTID IN (" + sCtrPntIDList1 + ")";

                    //add all the *references* to Parcel ids for the radial lines,
                    //and add the ID's of the lines
                    IFeatureCursor pFeatCursLines8 = pLines.Search(pQuFilter, false);
                    IFeature       pFeat8          = pFeatCursLines8.NextFeature();
                    while (pFeat8 != null)
                    {
                        object Attr_val = pFeat8.get_Value(iDistanceIDX);
                        double dVal     = 0;
                        if (Attr_val != DBNull.Value)
                        {
                            dVal = Convert.ToDouble(Attr_val);
                        }
                        dRadiusBuff = dRadiusBuff > dVal ? dRadiusBuff : dVal;
                        int iVal = Convert.ToInt32(pFeat8.get_Value(iParcelIDX));
                        if (!pParcelsList.Contains(iVal))
                        {
                            if (sRadialLineListParcelID.Trim() == "")
                            {
                                sRadialLineListParcelID += Convert.ToString(iVal);
                            }
                            else
                            {
                                sRadialLineListParcelID += "," + Convert.ToString(iVal);
                            }
                        }
                        pParcelsList.Add(iVal);

                        //pOrphanPointsList is used for "Pure Orphan point" detection
                        //meaning that these are points that do not have ANY line, not even an orphan line.
                        iVal = (int)pFeat8.get_Value(iFromPtFldIDX);
                        if (pOrphanPointsList.Contains(iVal))
                        {
                            pOrphanPointsList.Remove(iVal);
                        }

                        iVal = (int)pFeat8.get_Value(iToPtFldIDX);
                        if (pOrphanPointsList.Contains(iVal))
                        {
                            pOrphanPointsList.Remove(iVal);
                        }

                        if (sRadialLinesID.Trim() == "")
                        {
                            sRadialLinesID += Convert.ToString(iVal);
                        }
                        else
                        {
                            sRadialLinesID += "," + Convert.ToString(iVal);
                        }

                        //Add from point to list
                        if (sRadialLinePoints.Trim() == "")
                        {
                            sRadialLinePoints += Convert.ToString(pFeat8.get_Value(iFromPtFldIDX));
                        }
                        else
                        {
                            sRadialLinePoints += "," + Convert.ToString(pFeat8.get_Value(iFromPtFldIDX));
                        }
                        //Add To point to list
                        sRadialLinePoints += "," + Convert.ToString(pFeat8.get_Value(iToPtFldIDX));

                        Marshal.ReleaseComObject(pFeat8);
                        pFeat8 = pFeatCursLines8.NextFeature();
                    }
                    Marshal.FinalReleaseComObject(pFeatCursLines8);

                    //create a polygon goeometry that is a buffer of the selection rectangle expanded
                    //to the greatest radius of all the radial lines found.
                    ITopologicalOperator topologicalOperator = (ITopologicalOperator)ToolSelectGeometry;
                    pBufferedToolSelectGeometry = topologicalOperator.Buffer(dRadiusBuff) as IPolygon;
                }
                else
                {
                    pQuFilter.WhereClause = "";
                }
                #endregion

                #region OrphanLines

                if (pGeomColl.GeometryCount != 0)
                {
                    pUnionedPolyine = new PolylineClass();
                    pUnionedPolyine.ConstructUnion((IEnumGeometry)pGeomBag);
                    ITopologicalOperator pTopoOp     = (ITopologicalOperator)pUnionedPolyine;
                    IGeometry            pConvexHull = pTopoOp.ConvexHull();
                    //With this convex hull, do a small buffer,
                    //theis search geometry is used as a spatial query on the parcel polygons
                    //and also on the parcel lines, to build IN Clauses
                    pTopoOp = (ITopologicalOperator)pConvexHull;
                    IGeometry pBufferedConvexHull = pTopoOp.Buffer(10 * dXYTol);
                    if (pBufferedToolSelectGeometry != null)
                    {
                        pTopoOp = (ITopologicalOperator)pBufferedToolSelectGeometry;
                        IGeometry pUnionPolygon = pTopoOp.Union(pBufferedConvexHull);
                        pSpatFilt.Geometry = pUnionPolygon;
                    }
                    else
                    {
                        pSpatFilt.Geometry = pBufferedConvexHull;
                    }
                }
                else
                {
                    if (pQuFilter.WhereClause.Trim() == "" && pBufferedToolSelectGeometry == null)
                    {
                        pSpatFilt.Geometry = ToolSelectGeometry;
                    }
                    else
                    {
                        pSpatFilt.Geometry = pBufferedToolSelectGeometry;
                    }
                }

                IColor pColor = new RgbColorClass();
                pColor.RGB = System.Drawing.Color.Blue.ToArgb();
                IScreenDisplay pScreenDisplay = ArcMap.Document.ActiveView.ScreenDisplay;
                FabricUTILS.FlashGeometry(pSpatFilt.Geometry, pScreenDisplay, pColor, 5, 100);

                pSpatFilt.SearchOrder = esriSearchOrder.esriSearchOrderSpatial;

                m_sDebug = "Searching Parcels table.";
                pInvArea = new InvalidAreaClass();
                IFeatureCursor pFeatCursParcels = pParcels.Search(pSpatFilt, false);
                IFeature       pFeat2           = pFeatCursParcels.NextFeature();
                string         sParcelIDList    = "";
                iCount = 0;
                //create the "NOT IN" CLAUSE for parcels that exist in the DB and that are within the search area
                //Will be used as a search on lines to get the Orphan Lines

                while (pFeat2 != null)
                {
                    iCount++;
                    if (sParcelIDList.Trim() == "")
                    {
                        sParcelIDList += pFeat2.OID.ToString();
                    }
                    else
                    {
                        sParcelIDList += "," + pFeat2.OID.ToString();
                    }

                    Marshal.ReleaseComObject(pFeat2);
                    if (iCount > 999)
                    {
                        break;
                    }
                    pFeat2 = pFeatCursParcels.NextFeature();
                }
                Marshal.FinalReleaseComObject(pFeatCursParcels);

                //if we have more than 999 in clause tokens, there will be problems on Oracle.
                //Since this is an interactive tool, we expect it not to be used on a large amount of data.
                //for this reason, the following message is displayed if more than 999 parcels are returned in this query.
                //TODO: for the future this can be made to work on larger sets of data.
                if (iCount > 999)
                {
                    throw new InvalidOperationException("The Delete Orphans tool works with smaller amounts of data." + Environment.NewLine +
                                                        "Please try again, by selecting fewer fabric lines and points. (More than 1000 parcels returned.)");
                }

                m_sDebug = "Building the used points list.";
                //This first pass contains all references to points found within the parent parcel search buffer
                //Later, points are removed from this list
                IFeatureCursor pFeatCursLargerLineSet = pLines.Search(pSpatFilt, false);
                IFeature       pFeat3 = pFeatCursLargerLineSet.NextFeature();
                while (pFeat3 != null)
                {
                    iCount++;
                    object Attr_val = pFeat3.get_Value(iCtrPtFldIDX);
                    if (Attr_val != DBNull.Value)
                    {
                        pUsedPoints.Add(Convert.ToInt32(Attr_val)); //add center point
                    }
                    int iVal = (int)pFeat3.get_Value(iFromPtFldIDX);
                    pUsedPoints.Add(iVal);//add from point

                    iVal = (int)pFeat3.get_Value(iToPtFldIDX);
                    pUsedPoints.Add(iVal);//add to point

                    Marshal.ReleaseComObject(pFeat3);
                    pFeat3 = pFeatCursLargerLineSet.NextFeature();
                }
                Marshal.FinalReleaseComObject(pFeatCursLargerLineSet);

                //pUsedPoints list is at this stage, references to points for all lines found within the search area.
                //use the IN clause of the parcel ids to search for lines within
                //the original search box, and that are also orphans that do not have a parent parcel.
                pSpatFilt.WhereClause = "";
                pSpatFilt.Geometry    = ToolSelectGeometry;
                pSpatFilt.SpatialRel  = esriSpatialRelEnum.esriSpatialRelIntersects;
                pSpatFilt.SearchOrder = esriSearchOrder.esriSearchOrderSpatial;

                IFeatureCursor pFeatCursor = null;
                if (pGeomColl.GeometryCount == 0)
                {
                    if (sParcelIDList.Trim().Length > 0 && sCtrPntIDList1.Trim().Length > 0)
                    {
                        pQuFilter.WhereClause = "(PARCELID NOT IN (" + sParcelIDList +
                                                ")) AND (CATEGORY = 4 AND TOPOINTID IN (" + sCtrPntIDList1 + "))";
                        pFeatCursor = pLines.Search(pQuFilter, false);
                    }
                    else if (sParcelIDList.Trim().Length == 0 && sCtrPntIDList1.Trim().Length > 0)
                    {
                        pQuFilter.WhereClause = "CATEGORY = 4 AND TOPOINTID IN (" + sCtrPntIDList1 + ")";
                        pFeatCursor           = pLines.Search(pQuFilter, false);
                    }
                }
                else
                {//do a spatial query
                    if (sParcelIDList.Trim().Length > 0)
                    {
                        pSpatFilt.WhereClause = "PARCELID NOT IN (" + sParcelIDList + ")";
                    }
                    else
                    {
                        pSpatFilt.WhereClause = "";
                    }
                    pFeatCursor = pLines.Search(pSpatFilt, false);
                }

                m_sDebug = "Collecting lines to be deleted.";

                //start collecting the lines that need to be deleted
                iCount = 0;
                int    iCtrPointCount         = 0;
                string sCtrPointIDList        = "";
                string sLineParcelIDReference = "";
                //Feature cursor is lines that are NOT IN the ParcelIDList

                if (pFeatCursor != null)
                {
                    pLineFIDs = new FIDSetClass();
                    IFeature pFeat4 = pFeatCursor.NextFeature();
                    while (pFeat4 != null)
                    {
                        iCount++;
                        pLineFIDs.Add(pFeat4.OID);
                        int iParcRef = Convert.ToInt32(pFeat4.get_Value(iParcelIDX));
                        if (sLineParcelIDReference.Trim() == "")
                        {
                            sLineParcelIDReference = iParcRef.ToString();
                        }
                        else
                        {
                            if (!pLineToParcelIDRef.Contains(iParcRef))
                            {
                                sLineParcelIDReference += "," + iParcRef.ToString();
                            }
                        }
                        pLineToParcelIDRef.Add(iParcRef);
                        pInvArea.Add((IObject)pFeat4);
                        //now for this line, get it's points
                        //first add the center point reference if there is one
                        object Attr_val = pFeat4.get_Value(iCtrPtFldIDX);
                        if (Attr_val != DBNull.Value)
                        {
                            iCtrPointCount++;
                            int iCtrPointID = Convert.ToInt32(Attr_val);
                            pDeletedLinesPoints.Add(iCtrPointID); //add this line's center point
                            pUsedPoints.Remove(iCtrPointID);

                            if (sCtrPointIDList.Trim() == "")
                            {
                                sCtrPointIDList = iCtrPointID.ToString();
                            }
                            else
                            {
                                if (CtrPointIDList.Contains(iCtrPointID))
                                {
                                    iCtrPointCount--;
                                }
                                else
                                {
                                    sCtrPointIDList += "," + iCtrPointID.ToString();
                                }
                            }
                            CtrPointIDList.Add(iCtrPointID);//to keep track of repeats
                        }
                        //and also add the FROM and TO point references if they exist
                        int iVal = (int)pFeat4.get_Value(iFromPtFldIDX);
                        pDeletedLinesPoints.Add(iVal);//add FROM point
                        if (pGeomColl.GeometryCount > 0)
                        {
                            pUsedPoints.Remove(iVal);
                        }

                        iVal = (int)pFeat4.get_Value(iToPtFldIDX);
                        pDeletedLinesPoints.Add(iVal);//add TO point
                        if (pGeomColl.GeometryCount > 0)
                        {
                            pUsedPoints.Remove(iVal);
                        }

                        Marshal.ReleaseComObject(pFeat4);
                        if (iCtrPointCount > 999)
                        {
                            break;
                        }
                        pFeat4 = pFeatCursor.NextFeature();
                    }
                    Marshal.FinalReleaseComObject(pFeatCursor);
                }
                if (iCtrPointCount > 999)
                {
                    throw new InvalidOperationException("The Delete Orphans tool works with smaller amounts of data." + Environment.NewLine +
                                                        "Please try again, by selecting fewer fabric lines and points. (More than 1000 center points returned.)");
                }

                m_sDebug = "Adding orphan radial lines to list.";

                if (sCtrPointIDList.Trim().Length > 0)
                {
                    //add the Radial lines at each end of the curves using the collected CtrPtIDs
                    //CtrPt is always TO point, so find lines CATEGORY = 4 AND TOPOINT IN ()

                    pQuFilter.WhereClause = "CATEGORY = 4 AND TOPOINTID IN (" + sCtrPointIDList + ")";
                    pFeatCursor           = pLines.Search(pQuFilter, false);
                    IFeature pFeat5 = pFeatCursor.NextFeature();
                    while (pFeat5 != null)
                    {
                        pLineFIDs.Add(pFeat5.OID);
                        int iParcRef = Convert.ToInt32(pFeat5.get_Value(iParcelIDX));
                        pLineToParcelIDRef.Add(iParcRef);
                        if (sLineParcelIDReference.Trim() == "")
                        {
                            sLineParcelIDReference = iParcRef.ToString();
                        }
                        else
                        {
                            if (!pLineToParcelIDRef.Contains(iParcRef))
                            {
                                sLineParcelIDReference += "," + iParcRef.ToString();
                            }
                        }
                        Marshal.ReleaseComObject(pFeat5);
                        pFeat5 = pFeatCursor.NextFeature();
                    }
                    Marshal.FinalReleaseComObject(pFeatCursor);
                }
                else
                {
                    pQuFilter.WhereClause = "";
                }

                //refine the DeletedLinesPoints list
                foreach (int i in pUsedPoints)
                {
                    if (pDeletedLinesPoints.Contains(i))
                    {
                        do
                        {
                        } while (pDeletedLinesPoints.Remove(i));
                    }
                }

                //add the points to a new FIDSet
                pPointFIDs = new FIDSetClass();
                foreach (int i in pDeletedLinesPoints)
                {
                    pPointFIDs.Add(i);
                }

                #endregion

                #region OrphanPoints
                //We already know which points to delete based on taking down the orphan lines.
                //We need to still add to the points FIDSet those points that are "pure" ophan points
                //as defined for the pOrphanPointsList variable.
                //and add the orphan points to the points FIDSet
                foreach (int i in pOrphanPointsList)
                {
                    bool bFound = false;
                    pPointFIDs.Find(i, out bFound);
                    if (!bFound)
                    {
                        pPointFIDs.Add(i);
                    }
                }
                #endregion

                #region orphan Line points
                //next check for orphan line-points
                //the line-point is deleted if there is no underlying point
                //or if the from and to point references do not exist.
                pSpatFilt.WhereClause = "";
                pSpatFilt.Geometry    = ToolSelectGeometry;
                IFeatureCursor pFeatCursLinePoints = pLinePoints.Search(pSpatFilt, false);
                IFeature       pLPFeat             = pFeatCursLinePoints.NextFeature();
                int            iLinePtPointIdIdx   = pLinePoints.FindField("LINEPOINTID");
                int            iLinePtFromPtIdIdx  = pLinePoints.FindField("FROMPOINTID");
                int            iLinePtToPtIdIdx    = pLinePoints.FindField("TOPOINTID");

                pLinePointFIDs = new FIDSetClass();
                while (pLPFeat != null)
                {
                    bool bExistsA = true;

                    bool bExists1 = true;
                    bool bExists2 = true;
                    bool bExists3 = true;

                    int iVal = (int)pLPFeat.get_Value(iLinePtPointIdIdx);
                    pPointFIDs.Find(iVal, out bExists1);
                    if (!pPointsInsideBoxList.Contains(iVal))
                    {
                        bExistsA = false;
                    }

                    iVal = (int)pLPFeat.get_Value(iLinePtFromPtIdIdx);
                    string sFrom = iVal.ToString();
                    pPointFIDs.Find(iVal, out bExists2);

                    iVal = (int)pLPFeat.get_Value(iLinePtToPtIdIdx);
                    string sTo = iVal.ToString();
                    pPointFIDs.Find(iVal, out bExists3);

                    int iOID = pLPFeat.OID;

                    if (bExists1 || bExists2 || bExists3)
                    {
                        pLinePointFIDs.Add(iOID);
                    }

                    if (!sFromToPair.Contains(sFrom + ":" + sTo) && !sFromToPair.Contains(sTo + ":" + sFrom))
                    {
                        pLinePointFIDs.Find(iOID, out bExists1);
                        if (!bExists1)
                        {
                            pLinePointFIDs.Add(iOID);
                        }
                    }

                    //if (!bExistsA || !bExistsB || !bExistsC)
                    if (!bExistsA)
                    {
                        bool bFound = true;
                        pLinePointFIDs.Find(iOID, out bFound);
                        if (!bFound)
                        {
                            pLinePointFIDs.Add(iOID);
                        }
                    }
                    pPointsInsideBoxList.Contains(iVal);

                    Marshal.ReleaseComObject(pLPFeat);
                    pLPFeat = pFeatCursLinePoints.NextFeature();
                }

                Marshal.FinalReleaseComObject(pFeatCursLinePoints);
                #endregion

                #region Refine the lines that are on the delete list
                //next step is to refine and double-check to make sure that the lines that are on the delete list
                //do not have a parcel record somewhere else (not spatially connected to the line) (example unjoined, or bad geom)
                string sFreshlyFoundParcels = "";
                if (sLineParcelIDReference.Trim() != "")
                {
                    pQuFilter.WhereClause = sPref + pParcels.OIDFieldName + sSuff + " IN (" + sLineParcelIDReference + ")";
                    pFeatCursor           = pParcels.Search(pQuFilter, false);
                    IFeature pFeat6 = pFeatCursor.NextFeature();
                    while (pFeat6 != null)
                    {
                        int iOID = pFeat6.OID;
                        if (sFreshlyFoundParcels.Trim() == "")
                        {
                            sFreshlyFoundParcels = iOID.ToString();
                        }
                        else
                        {
                            sFreshlyFoundParcels += "," + iOID.ToString();
                        }
                        Marshal.ReleaseComObject(pFeat6);
                        pFeat6 = pFeatCursor.NextFeature();
                    }
                    Marshal.FinalReleaseComObject(pFeatCursor);

                    if (sFreshlyFoundParcels.Trim() != "")
                    {
                        pQuFilter.WhereClause = "PARCELID IN (" + sFreshlyFoundParcels + ")";
                        pFeatCursor           = pLines.Search(pQuFilter, false);
                        IFeature pFeat9 = pFeatCursor.NextFeature();
                        while (pFeat9 != null)
                        {
                            int  iOID    = pFeat9.OID;
                            bool bIsHere = false;
                            pLineFIDs.Delete(iOID);
                            int iVal = Convert.ToInt32(pFeat9.get_Value(iFromPtFldIDX));
                            pPointFIDs.Find(iVal, out bIsHere);
                            if (bIsHere)
                            {
                                pPointFIDs.Delete(iVal);
                            }

                            iVal = Convert.ToInt32(pFeat9.get_Value(iToPtFldIDX));
                            pPointFIDs.Find(iVal, out bIsHere);
                            if (bIsHere)
                            {
                                pPointFIDs.Delete(iVal);
                            }

                            Marshal.ReleaseComObject(pFeat9);
                            pFeat9 = pFeatCursor.NextFeature();
                        }
                        Marshal.FinalReleaseComObject(pFeatCursor);
                    }
                }
                #endregion

                #region Make sure the points on the delete list are not part of a construction
                //For post 10.0, Make sure the points on the delete list are not part of a construction if they are then null geometry
                //pQuFilter.WhereClause=pLines.LengthField.Name + " = 0 AND CATEGORY <> 4";
                //IFeatureCursor pFeatCursLines101 = pLines.Search(pQuFilter, false);
                //this would open a new cursor and do a query on the entire
                #endregion

                #region report results and do edits
                dlgReport Report = new dlgReport();
                //Display the dialog
                System.Drawing.Color BackColorNow = Report.textBox1.BackColor;
                if (iCount == 0 && pPointFIDs.Count() == 0 && pLinePointFIDs.Count() == 0)
                {
                    Report.textBox1.BackColor = System.Drawing.Color.LightGreen;
                    Report.textBox1.Text      = "Selected area has no orphan lines or points.";
                }
                else
                {
                    int iCount1 = 0;
                    int iCount2 = 0;
                    int iCount3 = 0;
                    if (pLineFIDs != null)
                    {
                        iCount1 = pLineFIDs.Count();
                    }

                    if (pPointFIDs != null)
                    {
                        iCount2 = pPointFIDs.Count();
                    }

                    if (pLinePointFIDs != null)
                    {
                        iCount3 = pLinePointFIDs.Count();
                    }

                    iCount = iCount1 + iCount2 + iCount3;
                    if (iCount > 0)
                    {
                        pEd.StartOperation();
                        FabricUTILS.DeleteRowsByFIDSet((ITable)pLines, pLineFIDs, null, null);
                        FabricUTILS.DeleteRowsByFIDSet((ITable)pPoints, pPointFIDs, null, null);
                        if (pPointFIDs.Count() > 0)
                        {
                            //now need to update the control points associated with any deleted points.
                            ICadastralFabricSchemaEdit2 pSchemaEd = (ICadastralFabricSchemaEdit2)pCadFabric;
                            ITable     pControlTable       = pCadFabric.get_CadastralTable(esriCadastralFabricTable.esriCFTControl);
                            int        idxNameFldOnControl = pControlTable.FindField("POINTID");
                            string     ControlNameFldName  = pControlTable.Fields.get_Field(idxNameFldOnControl).Name;
                            int        i;
                            List <int> pPointFIDList = new List <int>();
                            pPointFIDs.Reset();
                            pPointFIDs.Next(out i);
                            while (i > -1)
                            {
                                pPointFIDList.Add(i);
                                pPointFIDs.Next(out i);
                            }
                            List <string> InClausePointsNotConnectedToLines = FabricUTILS.InClauseFromOIDsList(pPointFIDList, 995);
                            pQuFilter.WhereClause = ControlNameFldName + " IN (" + InClausePointsNotConnectedToLines[0] + ")";
                            pSchemaEd.ReleaseReadOnlyFields(pControlTable, esriCadastralFabricTable.esriCFTControl); //release safety-catch
                            if (!FabricUTILS.ResetControlAssociations(pControlTable, pQuFilter, false))
                            {
                                pSchemaEd.ResetReadOnlyFields(esriCadastralFabricTable.esriCFTControl);//set safety back on
                                pEd.AbortOperation();
                                return;
                            }
                            pSchemaEd.ResetReadOnlyFields(esriCadastralFabricTable.esriCFTControl);//set safety back on
                        }
                        pQuFilter.WhereClause = "";
                        FabricUTILS.DeleteRowsByFIDSet((ITable)pLinePoints, pLinePointFIDs, null, null);
                        pEd.StopOperation("Delete " + iCount.ToString() + " orphans");
                        Report.textBox1.Text = "Deleted:";
                        if (iCount1 > 0)
                        {
                            Report.textBox1.Text += Environment.NewLine + iCount1.ToString() + " orphaned lines";
                        }
                        if (iCount2 > 0)
                        {
                            Report.textBox1.Text += Environment.NewLine + iCount2.ToString() + " orphaned points";
                        }
                        if (iCount3 > 0)
                        {
                            Report.textBox1.Text += Environment.NewLine + iCount3.ToString() + " orphaned line points";
                        }
                    }
                    if (sFreshlyFoundParcels.Trim() != "")
                    {
                        if (Report.textBox1.Text.Trim() != "")
                        {
                            Report.textBox1.Text += Environment.NewLine;
                        }
                        Report.textBox1.Text += "Info: Line(s) that you selected are not directly" +
                                                Environment.NewLine + "touching a parent parcel geometry. Check parcels with OIDs:" +
                                                sFreshlyFoundParcels;
                    }
                }
                IArea pArea = (IArea)ToolSelectGeometry;
                if (pArea.Area > 0)
                {
                    SetDialogLocationAtPoint(Report, pArea.Centroid);
                }

                DialogResult pDialogResult = Report.ShowDialog();
                Report.textBox1.BackColor = BackColorNow;
                pInvArea.Display          = ArcMap.Document.ActiveView.ScreenDisplay;
                pInvArea.Invalidate((short)esriScreenCache.esriAllScreenCaches);

                if (pPointLayer != null)
                {
                    ArcMap.Document.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography,
                                                              pPointLayer, ArcMap.Document.ActiveView.Extent);
                }
                #endregion
            }

            catch (Exception ex)
            {
                if (pEd != null)
                {
                    pEd.AbortOperation();
                }
                MessageBox.Show(ex.Message + Environment.NewLine + m_sDebug, "Delete Orphans Tool");
                this.OnDeactivate();
            }

            #region Final Cleanup
            finally
            {
                pDeletedLinesPoints.Clear();
                pDeletedLinesPoints = null;
                pUsedPoints.Clear();
                pUsedPoints = null;
                CtrPointIDList.Clear();
                CtrPointIDList = null;
                pParcelsList.Clear();
                pParcelsList = null;
                pOrphanPointsList.Clear();
                pOrphanPointsList = null;
                pPointsInsideBoxList.Clear();
                pPointsInsideBoxList = null;
                pLineToParcelIDRef.Clear();
                pLineToParcelIDRef = null;
                sFromToPair.Clear();
                sFromToPair = null;

                FabricUTILS = null;
            }
            #endregion
        }