Verifying that a string contains only letters in C# (if, else function or Regex)

Question

I need this in my code for Caesar Cipher, for encryption and decryption also. I don't know where to put the function in the code. The code should work like this, if I enter the message: "Autumn has come23", to suggest the correct range.

If you need the code, tell me!

Answer 1

这可能就是您要找的。

bool isMatch = Regex.Match(input, @"^[a-z]*$", RegexOptions.IgnoreCase).Success;