DbC doesn't need to be dealt with at every level of the call chain if that's what you mean. It may seem a bit verbose, but it usually expresses logic that woul

DbC doesn't need to be dealt with at every level of the call chain if that's what you mean. It may seem a bit verbose, but it usually expresses logic that would be in your program or in your tests anyway. Difference is, you will be doing it in a pretty terse and declarative manner. IMO, DbC is one of the coolest features of .NET 4.0.