C# Compiler Warning – CS8621 nullability of reference types in return

In this blog post, you’ll learn more about the C# Compiler Warning – CS8621 and the related message description

C# Compiler Warning Code

CS8621

C# Compiler Description for the Code :CS8621

Nullability of reference types in return type of ‘{0}’ doesn’t match the target delegate ‘{1}’ (possibly because of nullability attributes).