"java wildcard" in C #?

There is a similar C # generic question "where is the constraint" with "any generic type" definition? does not apply to Java templates. The answer provided there will most likely help you.

From this answer, a possible class signature would be:

public abstract class AAA<T, TOther> : CCC<T>
    where T : BBB<TOther>
{}

      

        
        
        
      

    

Generics in C # must have named type parameters, even if you never plan on using that type explicitly / implicitly. And all type parameters must be named in the method / class / interface identifier declaration.

Note that it would be possible to restrict TOther to objects only if desired, using:

public abstract class AAA<T, TOther> : CCC<T>
    where T : BBB<TOther>
    where TOther : object
{}