.Net Com Interop Create Instance Slow

Posted by B Z on Stack Overflow See other posts from Stack Overflow or by B Z
Published on 2010-05-11T21:03:06Z Indexed on 2010/05/11 21:04 UTC
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.NET

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com

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com-interop

I have a .net 4 application that uses a Com Dll to send SMS messages. I used TlbImp to create the interop assembly and that is what is referenced in the application.

When I try to create an instance of this class, it takes a really long time (2-5 seconds).

I ran performance profile in VS 2010 and the call that takes the longest by far is System.Activator.CreateInstance().

I am looking for tips on how to debug or gotchas with using Com Interop.

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