/// <summary>
/// Saves the flowchart document into a stream
/// </summary>
public void SaveToStream(Stream stream, bool clearDirty)
{
PersistContext ctx = new PersistContext(stream, this);
ctx.writeHeader();
// write properties
DocInfoVer1 docInfo1 = new DocInfoVer1(this);
DocInfoVer2 docInfo2 = new DocInfoVer2(this);
ctx.saveObject(docInfo1);
ctx.saveObject(docInfo2);
ctx.saveStringFormat(textFormat);
ctx.saveFont(Font);
ctx.saveImage(BackgroundImage);
// write collections
ctx.saveObject(zOrder);
ctx.saveObject(groups);
ctx.saveObject(selection);
ctx.saveReference(this, activeObject, 1);
ctx.saveObject(shapeTemplate);
Brush.StoreBrushes(new BinaryWriter(stream), ctx);
ctx.saveObject(boxPen);
ctx.saveObject(arrowPen);
ctx.saveObject(tablePen);
ctx.saveReference(this, boxBrush, 2);
ctx.saveReference(this, arrowBrush, 3);
ctx.saveReference(this, tableBrush, 4);
ctx.writer.Write((int)boxSelStyle);
ctx.writer.Write((int)tableSelStyle);
// new in save format 5
ctx.writer.Write(allowLinksRepeat);
// new in save format 6
ctx.writer.Write(PolyTextLayout);
ctx.writer.Write(ShapeOrientation);
// new in save format 8
ctx.writer.Write(routeArrows);
ctx.writer.Write(arrowsRetainForm);
ctx.writer.Write((int)arrowTextStyle);
ctx.writer.Write((int)tableLinkStyle);
// new in save format 12
ctx.writer.Write((int)measureUnit);
ctx.saveRect(docExtentsMin);
// new in save format 14
ctx.writer.Write((int)expandBtnPos);
ctx.writer.Write((int)Orientation.Auto); // not used anymore
ctx.writer.Write((int)Orientation.Auto); // not used anymore
ctx.writer.Write(enableStyledText);
ctx.writer.Write(usePolyTextLt);
ctx.saveReference(this, brush, 5);
// new in save format 17
ctx.writer.Write(arrowText);
ctx.writer.Write(boxText);
ctx.writer.Write((int)arrowCrossings);
ctx.writer.Write((int)gridStyle);
ctx.writer.Write(crossRadius);
// new in save format 20
ctx.saveReference(this, exteriorBrush, 6);
ctx.writer.Write(arrowsSnapToBorders);
ctx.writer.Write((int)arrowSelStyle);
// new in save format 21
bool tagSerializable = false;
if (Tag != null)
tagSerializable = Tag.GetType().IsSerializable;
ctx.writer.Write(tagSerializable);
if (tagSerializable)
ctx.saveTag(Tag);
// new in save format 27
ctx.writer.Write(roundedArrows);
ctx.writer.Write(roundedArrowsRadius);
// write the chart objects
ctx.writeReferencedObjects();
if (clearDirty)
Dirty = false;
}