This class supports design-time control template editing.

public interface ITemplateEditingService {
// Public Instance Properties
   public bool SupportsNestedTemplateEditing{get; }
// Public Instance Methods
   public ITemplateEditingFrame CreateFrame(TemplatedControlDesigner designer, string frameName, 
        string[ ] templateNames);
   public ITemplateEditingFrame CreateFrame(TemplatedControlDesigner designer, string frameName, 
        string[ ] templateNames, System.Web.UI.WebControls.Style controlStyle, 
        System.Web.UI.WebControls.Style[ ] templateStyles);
   public string GetContainingTemplateName(System.Web.UI.Control control);
}

Implemented By

TemplateEditingService