C# Compiler Error – CS1961 invalid variance: the type parameter ‘{1

In this blog post, you’ll learn more about the C# Compiler Error – CS1961 and the related message description

C# Compiler Error Code

CS1961

C# Compiler Description for the Code :CS1961

Invalid variance: The type parameter ‘{1}’ must be {3} valid on ‘{0}’. ‘{1}’ is {2}.