30 March 2020

How do I - Fix the "You must add a reference to assembly netstandard" error?

When using NuGet, we can easily run into assembly reference issues.  A notorious error message is:

CS0012: The type ‘System.Object’ is defined in an assembly that is not referenced. You must add a reference to assembly ‘netstandard, Version=, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51’.

This can be very confusing especially if your app is NOT using the .NET Standard library at all.  Luckily the fix is easy enough.  Simply crack open your app.config or web.config file and added the following:

Happy coding.

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