Infinit loop in TreeItemId operator ==

When performing an if(id==null) in my code I started getting stack
overfow errors from this function.  I beleave the use of "==" inside
of the "operator ==" is causing an infinit loop?

		public static bool operator == (TreeItemId id1, TreeItemId id2)
		{
			if (id1 == null && id2 == null)
				return false;	
			return wxTreeItemId_Equal(Object.SafePtr(id1), Object.SafePtr(id2));
		}


mike


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