Question

I’m currently adding some new extended classes to this code:

foreach (BaseType b in CollectionOfExtendedTypes) {   if (b is ExtendedType1) {     ((ExtendedType1) b).foo = this;    }   else if (b is ExtendedType2) {     ((ExtenedType2) b).foo = this;    }    else {     b.foo = this;    } } 

and was curious if there is a way to use the is keyword functionality in a switch statement?

Answer 1

This really looks like a situation for a good polymorphic implementation. If you override the appropriate methods in the derived classes, you may not need the checks in the loop at all.