What feels cumbersome to some may not feel cumbersome to others, or they may not care as much about this, because, for example, they can feel that concrete code is less important than design, and considering that a minor reduction (at best) in the time spent working with code translates to negligible (or even negative) overall contribution to the project, and may certainly not justify sacrificing the many other conveniences that come with using a hugely popular, familiar and well-tooled language.

I can't really pinpoint it, but somehow C# dosen't seem so cumbersome as Java. Perhaps it's the libraries.

C# isn't as cumbersome as Java.