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Are you using Class Library project which targets .NET Core/.NET Standard instead of .NET Framework? Actually, this doc: Availability and extensions mentioned
Support only C# code that targets the .NET Framework
IntelliTest doesn’t support C# project which targets .NET Core or .NET Standard.
BTW, the request: Add IntelliTest support for .NET Core/Standard is on roadmap.
Thanks for your understanding, have a nice day.
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