For example, you can write a ... In C#, however, multiple inheritance is not allowed for classes, but rather only for interfaces in a limited way, so that does not contain state.

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.

It seems that MI has fallen severely out of favor. Neither of the two "big" programming languages to come out in the last few years, Java or C#, make use of multiple implementation inheritance ...