title: Converting to int16, int32, int64 - how do you know which one to choose?
body: <p>I often have to convert a retreived value (usually as a string) - and then convert it to an int.  But in C# (.Net) you have to choose either int16, int32 or int64 - how do you know which one to choose when you don't know how big your retrieved number will be? </p>