title: VS2010 C# Form not showing Dirty
body: <p>I have a few forms in a project that don't show to be 'Dirty' after adding a component or control.  This is causing the form to not save the Designer.cs file.  After closing the form and re-opening the new controls are lost.  This doesn't happen on all forms, so I know it is form specific.  Any thoughts?</p>