Checking preconditions in .NET

Question

I'm a fan of the "fail early" strategy and want to check that methods params have correct values for example. In Java I'd use something like Guava:

checkArgument(count > 0, "must be positive: %s", count);

Is there something similar for .NET?

Answer 1

What you want to do is Design By Contract.

You should use Code Contracts for defining contracts i.e. Preconditions, post-conditions and invariants for your types\methods in C#.

IMO the best and most comprehensive coverage of code-contracts is here.

Answer 2

Code contracts: http://msdn.microsoft.com/en-us/devlabs/dd491992