c#中的文字哈希？

using System;
using System.Security.Cryptography;
using System.Text;

namespace HashExample
{
    class Program
    {
        static void Main(string[] args)
        {
            string text = "Hello, world!";
            byte[] hash = ComputeHash(text);
            string hashString = Convert.ToBase64String(hash);
            Console.WriteLine($"The SHA-256 hash of '{text}' is: {hashString}");
        }

        static byte[] ComputeHash(string text)
        {
            using (SHA256 sha256 = SHA256.Create())
            {
                byte[] bytes = Encoding.UTF8.GetBytes(text);
                return sha256.ComputeHash(bytes);
            }
        }
    }
}