I suspect that you have a C++ background. If this is not accurate, ignore the rest. But if it is accurate, my plea to you is: Learn other languages. C++ has next to no innovative language features (even C++11's take on lambdas is an abomination) and encourages defensive programming to the point where it's ridiculous (I mean, no default initialization of variables? In 2012?).
Actually, C# has no default initialization* of local variables, and I love it. Instead, it is a compile-time error to read a variable if the compiler cannot guarantee that you have initialized it. IMO this is much better than D's "let's initialize doubles to NaN so that something fishy will happen at runtime if you forget to initialize it" :)
* technically the compiler asks the runtime to bitwise 0-fill everything, but that's just an implementation detail required for the .NET verifier, and the optimizer can ignore the request to preinitialize.
