Question

I have a method called isStringOnlyWhitespace():

public static bool isStringOnlyWhitespace(string toEval)
{
    string stringNoWhitespace = Regex.Replace(toEval, @"\s", "");
    if (stringNoWhitespace.Length > 0) return false;
    else return true;
}

Is there any reason to use this method to check for blank/null strings over String.IsNullOrEmpty()?

Answer 1

Sure, if you are shooting for slower code that is harder to read 🙂

You really want to use string.IsNullOrWhitespace though. Whoever wrote that code might have done so before this method existed. But even still, I’d prefer myString.Trim().Length == 0 in that case.