UserControls in ASP.NET (4.0) inherit from System.Web.UI.UserControl. VisualStudio intellisense suggest OnError as valid override of TemplateControl. At runtime .NET ignores this error handling. Only the OnError at Page-Level gets invoked. Did i miss anything or is there a design issue?

public partial class Sample : System.Web.UI.UserControl
{
    protected override void OnError(EventArgs e)
    {
        // Never reach ;o)
        base.OnError(e);
    }
}