Implementing class '<classname>' for interface <interfacename> cannot be found
An implementing class in the interop assembly is not available.
Error ID: BC31094
To correct this error
Verify that the type library for the COM object is valid.
Use the Type Library Importer (Tlbimp.exe) to manually create an interop assembly, and then add a reference to that interop assembly from your project.
See also
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