C# Compiler Error – CS8427 enums, classes, and structures cannot be

In this blog post, you’ll learn more about the C# Compiler Error – CS8427 and the related message description

C# Compiler Error Code

CS8427

C# Compiler Description for the Code :CS8427

Enums, classes, and structures cannot be declared in an interface that has an ‘in’ or ‘out’ type parameter.