C# Compiler Error – CS8650 it is not legal to use nullable referenc

In this blog post, you’ll learn more about the C# Compiler Error – CS8650 and the related message description

C# Compiler Error Code

CS8650

C# Compiler Description for the Code :CS8650

It is not legal to use nullable reference type ‘{0}?’ in an is-type expression; use the underlying type ‘{0}’ instead.