using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text.RegularExpressions; public class Test { public static void Main() { var input = @"My name @is ,Wan.;'; Wan"; var chrs = new[] {'@', ',', '.', ';', '\''}; var result = string.Concat(input.Where(c => !chrs.Contains(c))); Console.Write(result); } }