Drag & Drop for AddIn Projects

Hello, I have recently started with SharpDevelop. I am very impressed with the extensibility of the IDE..

I have created an AddIn using the F# example. I found that I was not able to drap & drop the projects to different folders in the Project Browser.

I found that SolutionFolderNode.DragDropEffects & DoDragDrop test for ProjectNode, but cannot test for a Node derived from ProjectNode as in the F# example. I used a bit of reflection to check for a derived type.

I changed the source as follows and it works. Not sure if it could be an idea for something you might consider including, or I am overlooking a simpler solution!

         private Type GetType(IDataObject dataObject)
        {
            string[ formats = dataObject.GetFormats();
            string typeName = formats[0];
            if (typeName == "WindowsForms10PersistentObject")
                typeName = formats[1];
            
            var assemblies = AppDomain.CurrentDomain.GetAssemblies().Where(a => a.FullName.Split('.')[0] == typeName.Split('.')[0]);
            
            Type t = null;    
            foreach (Assembly currentassembly in assemblies)
            {
                t = currentassembly.GetType(typeName, false, true);
                if (t != null)
                    break;
            }
            
            return t;            
        }

        public override DragDropEffects GetDragDropEffect(IDataObject dataObject, DragDropEffects proposedEffect)
        {
            Type t = GetType(dataObject);
            
            if (t == typeof(SolutionFolderNode))    {
                SolutionFolderNode folderNode = (SolutionFolderNode)dataObject.GetData(t);
                
                if (!folderNode.Folder.IsAncestorOf(this.folder)) {
                    return DragDropEffects.Move;
                }
            }
            
            if (t == typeof(SolutionItemNode) || t.BaseType == typeof(SolutionItemNode))    {
                SolutionItemNode solutionItemNode = (SolutionItemNode)dataObject.GetData(t);
                
                if (solutionItemNode.Parent != this) {
                    return DragDropEffects.Move;
                }
            }
            
            if (t == typeof(ProjectNode) || t.BaseType == typeof(ProjectNode))    {
                ProjectNode projectNode = (ProjectNode)dataObject.GetData(t);
                
                if (projectNode.Parent != this) {
                    return DragDropEffects.Move;
                }
            }
            
            return DragDropEffects.None;
        }