Hi,

Please can anyone explain the way draw control behaviour and control node has to be used.
I am trying to create a diagram with controlnodes but everytime i try creating the controlnode it throws an exception

code snippet

diagram.Behavior = Behavior.DrawControls;
diagram.DefaultControlType = typeof( System.Windows.Controls.TextBox) ;
           
TextBox tb = new TextBox();
tb.Text = "test";

ControlNode cntrl = new ControlNode(diagram, tb);

var layout = new MindFusion.Diagramming.Silverlight.Layout.TreeLayout();
layout.Arrange(diagram);

thanks in advance

Sorry for replying late

heres the stack trace

System.NullReferenceException was unhandled by user code
  Message="Object reference not set to an instance of an object."
  StackTrace:
      at MindFusion.Diagramming.Silverlight.DiagramNode.AddExpandButton()
      at MindFusion.Diagramming.Silverlight.DiagramNode.set_Expandable(Boolean value)
      at MindFusion.Diagramming.Silverlight.DiagramNode..ctor(Diagram parent)
      at MindFusion.Diagramming.Silverlight.ControlNode..ctor(Diagram parent, FrameworkElement control)
      at TreeLayout.Page.OnPageLoaded(Object sender, RoutedEventArgs e)
      at System.Windows.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
      at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)
  InnerException:

thanks in advance.