Excel get_Range missing when interop assembly is embedded in .NET 4.0

Posted by mikemay on Stack Overflow See other posts from Stack Overflow or by mikemay
Published on 2010-02-03T15:19:16Z Indexed on 2010/05/10 10:44 UTC
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I build an assembly referencing a COM interop DLL. If I embed the COM interop types by setting Embed Interop Types to True in the Reference's properties (VS2010), at run-time an error occurs "object does not contain a definition for get_Range". If COM interop types are not embedded then no error occurs.

Does anyone know why a particular method, Worksheet.get_Range should be ommitted or how to work around this or have any other relevant insights? I should be grateful for any help.

The interop dll contains a reference to Worksheet.get_Range(object, [object]). Using reflector on my calling assembly there is no mention of get_Range under Worksheet.

The interop assembly I am embedding is generated from Excel9.olb. I am not using PIAs as the application targets multiple Excel versions.

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