Why string.IsNullOrWhiteSpace(“\0”) is false

Question

I faced a problem where invisible character \\0 which is pretty like a \'white space\' not considered as white space by the string.IsNullOrWhiteSpace method. I

Answer 1

Create an extension method which adds the null char as a check.

public bool IsNullOrWhitespaceOrHasNullChar(this string text)
{
   return string.IsNullOrWhiteSpace(text) || Regex.IsMatch(text, "\0");
}

Note it the null char exists anywhere in the string, it will be found and reported as such, so a string with "a\0" would return true. If that is a concern create a test which checks for a full string of \0.