Simple environments for quickly testing .NET functionality

This post was inspired by a question on SO. It was a simple question about what the integer data type in C# does with the decimal portion of a number. The question itself is not the point, as much as the fact that it could have easily been avoided altogether by running the code and comparing the results. The astounding part was this statement: “I have to know before I run the code, cause it will jack everything up if it is wrong.” Really. The only environment he has available to test code is production?! Yikes. Needless to say, he »