private void InspectorTopSection()
        {
            if (Curve.PointsCount == 0)
            {
                EditorGUILayout.HelpBox(
                    "1) Ctrl + LeftClick in scene view to add a point and snap it to  "
                    + "\r\n    a) 3D mode: mesh with collider"
                    + "\r\n    b) 2D mode: curve's 2D plane."
                    + "\r\n"
                    + "\r\n2) Ctrl + Shift + LeftClick in Scene View to add a point unconditionally at some distance, specified in the settings."
                    + "\r\n"
                    + "\r\n3) Hold control over existing point or selection to access Scene View menu"
                    + "\r\n"
                    + "\r\n4) Hold shift + drag to use rectangular selection in Scene View"
                    + "\r\n"
                    + "\r\n5) Ctrl + LeftClick over existing spline to insert a point"
                    , MessageType.Info);
            }


            try
            {
                // Curve's block
                BGEditorUtility.VerticalBox(() =>
                {
                    //closed
                    EditorGUILayout.PropertyField(closedProperty);


                    //point's store mode
                    BGEditorUtility.Horizontal(() =>
                    {
                        EditorGUILayout.PropertyField(pointsModeProperty);

                        BGEditorUtility.DisableGui(() =>
                        {
                            BGEditorUtility.Assign(ref syncContent, () => new GUIContent("Sync", "Sort points Game Objects and update names"));

                            if (!GUILayout.Button(syncContent))
                            {
                                return;
                            }

                            BGPrivateField.Invoke(Curve, BGCurve.MethodSetPointsNames);
                        }, !BGCurve.IsGoMode(Curve.PointsMode));
                    });


                    //2D mode
                    BGEditorUtility.Horizontal(() =>
                    {
                        EditorGUILayout.PropertyField(mode2DProperty);
                        BGEditorUtility.DisableGui(() =>
                        {
                            if (!GUILayout.Button("Apply", GUI.skin.button, GUILayout.Width(80)))
                            {
                                return;
                            }

                            Curve.FireBeforeChange(BGCurve.Event2D);
                            Curve.Apply2D(Curve.Mode2D);
                            Curve.FireChange(BGCurveChangedArgs.GetInstance(Curve, BGCurveChangedArgs.ChangeTypeEnum.Points, BGCurve.Event2D));
                        }, mode2DProperty.enumValueIndex == 0);
                    });

                    //snapping
                    BGEditorUtility.VerticalBox(() =>
                    {
                        BGEditorUtility.Horizontal(() =>
                        {
                            EditorGUILayout.PropertyField(snapTypeProperty);

                            BGEditorUtility.DisableGui(() =>
                            {
                                if (!GUILayout.Button("Apply", GUI.skin.button, GUILayout.Width(80)))
                                {
                                    return;
                                }

                                Curve.FireBeforeChange(BGCurve.EventSnapType);
                                Curve.ApplySnapping();
                                Curve.FireChange(BGCurveChangedArgs.GetInstance(Curve, BGCurveChangedArgs.ChangeTypeEnum.Snap, BGCurve.EventSnapType));
                            }, snapTypeProperty.enumValueIndex == 0);
                        });

                        if (snapTypeProperty.enumValueIndex == 0)
                        {
                            return;
                        }

                        EditorGUILayout.PropertyField(snapAxisProperty);
                        EditorGUILayout.PropertyField(snapDistanceProperty);
                        EditorGUILayout.PropertyField(snapTriggerInteractionProperty);
                        EditorGUILayout.PropertyField(snapToBackFacesProperty);

                        BGEditorUtility.LayerMaskField("Snap Layer Mask", Curve.SnapLayerMask, i =>
                        {
                            Curve.FireBeforeChange(BGCurve.EventSnapTrigger);
                            Curve.SnapLayerMask = i;
                            Curve.ApplySnapping();
                            Curve.FireChange(BGCurveChangedArgs.GetInstance(Curve, BGCurveChangedArgs.ChangeTypeEnum.Snap, BGCurve.EventSnapTrigger));
                        });

                        EditorGUILayout.PropertyField(snapMonitoringProperty);
                        if (Curve.SnapMonitoring && Curve.SnapType != BGCurve.SnapTypeEnum.Off)
                        {
                            EditorGUILayout.HelpBox("You enabled snap monitoring, which monitor environment every frame and snap to it. Be aware, this is a very costly function", MessageType.Warning);
                        }
                    });

                    //event mode
                    EditorGUILayout.PropertyField(eventModeProperty);

                    //force update
                    EditorGUILayout.PropertyField(forceChangedEventModeProperty);

                    //convert control type
                    BGEditorUtility.Horizontal(() =>
                    {
                        EditorGUILayout.PropertyField(controlTypeProperty);

                        if (!BGEditorUtility.ButtonWithIcon(BGBinaryResources.BGConvertAll123, "Convert control types for all existing points ", 44))
                        {
                            return;
                        }

                        var settings = Settings;

                        foreach (var point in Curve.Points.Where(point => point.ControlType != settings.ControlType))
                        {
                            point.ControlType = settings.ControlType;
                        }
                    });
                });
            }
            catch (BGEditorUtility.ExitException)
            {
                GUIUtility.ExitGUI();
            }
        }