public Func <string> GetNumbers()
 {
     return(() => new string(AlphabetProvider.GetNumbers().ToArray()));
 }
 public Func <string> GetSpecial()
 {
     return(() => new string(AlphabetProvider.GetSpecialCharacters().ToArray()));
 }
 public Func <string> GetAlphabetUpper()
 {
     return(() => new string(AlphabetProvider.GetAlphabet().ToArray()).ToUpper());
 }