Default interface methods are included in a new feature proposal for C# 8, which will allow developers to use the traits programming technique. Based on an existing language feature found in Java ...

You should not use an interface if you need to write the same code for the interface methods. In this case, you should use an abstract class, define the method once, and reuse it as needed.

A controversial new proposal for .NET suggests the introduction of a limited form of multiple inheritance via abstract interfaces. This feature was inspired by Java’s default methods. The ...