如何在C#中从base64编码的字符串中获取sha1哈希

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

public class Program
{
    public static void Main()
    {
        string base64String = "SGVsbG8gd29ybGQh"; // 用于示例的base64编码字符串

        byte[] bytes = Convert.FromBase64String(base64String); // 将base64编码字符串转换为字节数组

        using (SHA1 sha1 = SHA1.Create())
        {
            byte[] hashBytes = sha1.ComputeHash(bytes); // 计算SHA1哈希值

            string sha1Hash = BitConverter.ToString(hashBytes).Replace("-", ""); // 将哈希值转换为字符串形式

            Console.WriteLine("SHA1哈希值: " + sha1Hash);
        }
    }
}