Well, the topic says it all.

I have a large C# addin that started from the SwCSharpAddin template.

I started to get a System.NullReferenceException when adding DestroyNotify (or DestroyNoticy2) and NewSelectionNotify event handlers.  I had been just catching the exception and moving on, but now the DestroyNotify handler has become more important.

Has anyone else had this issue?

Any suggestions what may be causing the exception?

Thanks, Matt