Where can Custom Designer catches the Exception of Control

Hi,

I'm developing custom designer like below

http://msdn.microsoft.com/msdnmag/issues/06/03/DesignerHosting/default.aspx

and a custom control.

this custom control has only specific controls as child. the related code is below

[Designer(typeof(CanParentExDesigner))]
public class CanParentEx : Panel
{
protected override void OnControlAdded(ControlEventArgs e)
{
if (!e.Control.GetType().Equals(typeof(Button)))
{
throw new InvalidOperationException(e.Control.Name);
}
else
{
base.OnControlAdded(e);
}
}
}

public class CanParentExDesigner : System.Windows.Forms.Design.ParentControlDesigner
{
public override bool CanParent(Control control)
{
return control.GetType().Equals(typeof(Button));
}

}

If user add another control on the custom control, it will throw Exception.

I want to catch the exception on custom designer. but, I don't know where I have to catch it.

If anybody knows, please let me know.

thanks

[1298 byte] By [sangminny] at [2007-12-24]