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Attributes for Importing Type Libraries into Interop Assemblies

The .NET Framework's COM interoperability mechanism provides four custom type library attributes to control the importation of type libraries into interop assemblies using the Type Library Importer (Tlbimp.exe). These custom attributes help keep type libraries in sync with the primary interop assemblies. They also allow backward compatibility with the functionality of Microsoft Visual Basic versions 5.0 and 6.0 without having to change interface definitions.

NoteNote:

Use these custom attributes only if you are unable to change the definitions in your Interface Definition Language (IDL) file. The preferred method in such situations, if possible, is to make the fix in the IDL rather than use the custom attributes.

These custom attributes enable you to perform the following operations:

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