How to remove all whitespace characters from a String?

Try using Linq in order to filter out white spaces:

  using System.Linq;

  ... 

  string source = "abc    \t def\r\n789";
  string result = string.Concat(source.Where(c => !char.IsWhiteSpace(c)));

  Console.WriteLine(result);

Outcome:

abcdef789

One way is to use Regex

public static string ReplaceAllWhiteSpaces(string str) {
  return Regex.Replace(str, @"\s+", String.Empty);
}

Taken from: https://codereview.stackexchange.com/questions/64935/replace-each-whitespace-in-a-string-with-20