CompactWhitespace

Returns a string with whitespaces compacted.

• Use Regex.Replace() with a regular expression to replace all occurences of 2 or more subsequent whitespace characters with a single space.

using System.Text.RegularExpressions;

public static partial class _30s 
{
  public static string CompactWhitespace(string str) 
  {
    return Regex.Replace(str, @"\s{2,}", " ");
  }
}

string s = "Lorem    ipsum\n   dolor sit   amet";

_30s.CompactWhitespace(s); // "Lorem ipsum dolor sit amet"