Question

How to check if a string contains only English letters in C#

Answer 1

using System;
using System.Text.RegularExpressions;

public class StringContainsOnlyEnglish
{
    public static bool IsOnlyEnglishLetters(string s)
    {
        string pattern = "^[a-zA-Z]+$";
        return Regex.IsMatch(s, pattern);
    }

    public static void Main()
    {
        string s1 = "CSharp";
        Console.WriteLine(IsOnlyEnglishLetters(s1));

        string s2 = "CSharpCシャープ";
        Console.WriteLine(IsOnlyEnglishLetters(s2));
    }
}



/*
run:

True
False

*/

 

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