How to elegantly check if a number is within a range?

Question

How can I do this elegantly with C# and .NET 3.5/4?

For example, a number can be between 1 and 100.

I know a simple if would suffice; but the keyword to this

Answer 1

There are a lot of options:

int x = 30;
if (Enumerable.Range(1,100).Contains(x))
    //true

if (x >= 1 && x <= 100)
    //true

Also, check out this SO post for regex options.