using System; using System.Text.RegularExpressions; class RegexSubstitution { public static void Main() { string testString1 = "a b c stars *****"; Regex testRegex1 = new Regex( @"d" ); Console.WriteLine( "Original string: " + testString1 ); Console.WriteLine( "Every word replaced by "word": " + Regex.Replace( testString1, @"w+", "word" ) ); } }