regular expression for anything but an empty string

Question

Is it possible to use a regular expression to detect anything that is NOT an \"empty string\" like this:

string s1 = \"\";
string s2 = \" \";
string s3 = \"          


        

Answer 1

You could also use:

public static bool IsWhiteSpace(string s) 
{
    return s.Trim().Length == 0;
}