Why Do I need to redeclare type constraint in generic subclass

Question

Recently I tried to create a generic subclass by implementing a generic interface.

public interface IModule where T : DataBean { ..... }
public class Mo         


        

Answer 1

The constranints on the interface are too vauge to tell the compiler what constraints the Module class should have. For example, the Module class could have a constraint on a super-class (inherited class) of DataBean.

I don't know the wisdom of the C# designers. Because the constraints can be different, I think a decision was made to have the developer explicitly declare the constraint rather than having the compiler make assumptions.