I have the following code which runs when my property manager closes.

       protected override void OnClose(swPropertyManagerPageCloseReasons_e reason)

        {

             if (reason ==  swPropertyManagerPageCloseReasons_e.swPropertyManagerPageClose_Okay)

            {

                if(State==StateEnum.Edit)

                {

                    IBody2[] objects = this.MacroFeature.SelectionMgr.GetSelectedObjects((type,mark)=>type==swSelectType_e.swSelSOLIDBODIES)

                        .Cast()

                        .ToArray();

                    //this.MacroFeature.SwFeatureData.SetSelections(ObjectArrayToDispatchWrapper(objects),null);

                   this.MacroFeature.SwFeatureData.SetSelections(objects,null);

                    Debug.Assert(this.MacroFeature.SwFeatureData.GetSelectionCount()==objects.Length);

                    this.MacroFeature.Write();

                    MacroFeature.ModifyDefinition();

                }

                else

                {

                    IBody2 editBody = null;

                    const int opts = 0;

                    FeatureManagerExtensions.InsertMacroFeature

                        (this.MacroFeature.ModelDoc.FeatureManager, featureName, editBody, opts, this.MacroFeature.Database);

                }

            }else if (reason == swPropertyManagerPageCloseReasons_e.swPropertyManagerPageClose_Cancel)

            {

                MacroFeature.ReleaseSelectionAccess();

            }

        }

I have previously called AccessSelections before raising the property page.  When I call SetSelections or SetSelections2 with a normal array or an array of DispatchWrappers the selection count does not change. See the Debug.Assert that tests this.

If I ignore the assert and let the feature commit then I find that the selections have not changed. What may I be doing wrong?

For info my Edit method that raises the property page is

       protected override object Edit()

        {

            ppage = new SamplePropertyPage(this, State);

            if (SwFeatureData != null)

            {

                var result = SwFeatureData.AccessSelections(ModelDoc, null);

                if(!result)

                    throw new Exception("Expected to get true");

                {

                    object objects;

                    object objectTypes;

                    object marks;

                    object drViews;

                    object componentXForms;

                    SwFeatureData.GetSelections3(out objects, out objectTypes, out marks, out drViews, out componentXForms);

                    if(objects!=null)

                    {

                        var objectsArray = ((object[])objects).Cast().ToList();

                        swSelectType_e[] typesArray = (swSelectType_e[])objectTypes;

                        ModelDoc.ClearSelection2(true);

                        foreach (var feature in objectsArray)

                        {

                            feature.Select2(true, null);

                        }

                    }

                }

            }

            ppage.Show();

            return null;

        }