zCane75:
So there's no way in a C# addin to get a double click from microstation?
This is a language issue, not a MicroStation issue. When you venture outside Microsoft's 'managed environment' there are things you can do and things you cannot do. Michael has pointed out that, to do what you want, you have run into a hole in the road on leaving the 'managed environment'.
Double-click events in MicroStation are rare — they are not part of the normal user interface idiom. That's why they are not supported by the COM interface.
If you want to interact intimately with the core of MicroStation you must consider writing C++ code.