Did you modify the code I posted here? I tested this in an OptionSet with 5 items and it worked fine for me with no overlap.

Maybe you could post a small sample project demonstrating the behavior you are getting.

It works for one option only.. If I add 2nd option, it overlapes on first..

what to do now??

Here's some sample code that centers the items within the control. I think it looks kinda weird, but if that's what you want, this should do it.

        public class MyCreationFilter : IUIElementCreationFilter
        {
            void IUIElementCreationFilter.AfterCreateChildElements(UIElement parent)
            {
                if (parent is OptionSetEmbeddableUIElement)
                {
                    foreach (UIElement element in parent.ChildElements)
                    {
                        if (element is OptionSetOptionButtonUIElement)
                        {
                            Rectangle rect = element.Rect;
                            DrawUtility.AdjustHAlign(HAlign.Center, ref rect, parent.RectInsideBorders);                            
                            element.Rect = rect;
                        }
                    }
                }
            }

            bool IUIElementCreationFilter.BeforeCreateChildElements(UIElement parent)
            {
                // Do nothing
                return false;
            }
        }

Hi,

It's still not clear to me exactly what you want. You want the text and the radio button both to be centered? Seems like a very strange UI to me. The radio buttons would not be lined up and you would have sort've jagged edges on both sides. That's really what you want?

Yes, I want radio button with text in center horizontally.

And I don't have idea of CreationFilter. Can you show me some code for this?