C# Compiler Error – CS8627 a nullable type parameter must be known

In this blog post, you’ll learn more about the C# Compiler Error – CS8627 and the related message description

C# Compiler Error Code

CS8627

C# Compiler Description for the Code :CS8627

A nullable type parameter must be known to be a value type or non-nullable reference type unless language version ‘{0}’ or greater is used. Consider changing the language version or adding a ‘class’, ‘struct’, or type constraint.