c# - Is there a benefit in writing code contract instead of straight up check logic code? -


we building business application not api others use, in case, prefer use our validation logic in if/then/throw model. told, better use code contracts. not see benefits, there obvious benefits not seeing? see problem using code contracts since static method call , there code injection happens after compile phase. thanks

there 2 obvious benefits:

(1) code easier read.

 contract.requires(someparam != null && someparam.somevalue != 0);

versus

if (someparam != null && someparam.somevalue != 0)     throw new argumentnullexception("someparam", someparam, "someparam can't null , someparam.somevalue can't zero.");

also, code contracts, predicate code automatically put failure message don't need write explicit message normal exceptions.

(2) can run code contracts static analysis on code , can find errors you.

there less obvious benefits:

(3) can generate documentation code contracts in xml doc files.

(4) can use contract.ensures() express postconditional constraints. allows avoid lot of code if (item.property1 != null && item.property1.property2 != null) ... because know neither property or property2 can null.

(5) code contracts form block separate rest of code.


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