Checking-for-special-characters-using-LINQ

StringExtensions.cs

public static class StringExtensions
{
  public static bool HasInvalidCharacters(this string value)
  {
    //Ascii range between 32 and 127
    IEnumerable<int> lowRange = Enumerable.Range(0, 32);
    IEnumerable<int> highRange = Enumerable.Range(128, 128);
    IEnumerable<int> enumerable = value.ToCharArray().Select(x => Convert.ToInt32(((int)x).ToString()));
    return lowRange.Intersect(enumerable).Count() != 0 || highRange.Intersect(enumerable).Count() != 0;
  }
}