用C#写一个方法验证刚才的签名是否正确

好的，以下是用 C# 实现验证签名是否正确的代码：

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

class Program
{
    static void Main(string[] args)
    {
        string content = "待签名的内容";
        string signature = "签名结果";

        string publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCzjC3SZz3QjwGJLr7B+2B6Ct/2Yvq6K5T8amFvYrUv9zQ9/q0MvJq0VJQivzJFb9zEgF4Jdf5UvJq3zGyUdDzNEfCQYRtHgJzX+L8h9hwgV+LUBsmJZL24f3VgHr6/8Ei8Zd3i4n+2o6sG0JX1X3LrRkz8J6I7qZCmpwM3rV0Lc4QIDAQAB";
        byte[] publicKeyBytes = Convert.FromBase64String(publicKey);
        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
        rsa.ImportCspBlob(publicKeyBytes);

        byte[] contentBytes = Encoding.UTF8.GetBytes(content);
        byte[] signatureBytes = Convert.FromBase64String(signature);
        bool verified = rsa.VerifyData(contentBytes, new SHA1CryptoServiceProvider(), signatureBytes);

        Console.WriteLine($"验证结果：{verified}");
    }
}

需要注意的是，验证签名的方法需要用到公钥，因此需要将公钥字符串转换成字节数组，并导入到 `RSACryptoServiceProvider` 对象中。如果签名正确，`VerifyData` 方法将会返回 `true`。