public class RSAKeyValue
    {
        public string Modulus { get; set; }
        public string Exponent { get; set; }
        public string P { get; set; }
        public string Q { get; set; }
        public string DP { get; set; }
        public string DQ { get; set; }
        public string InverseQ { get; set; }
        public string D { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();            

            XmlSerializer formater = new XmlSerializer(typeof(RSAKeyValue));
            StringReader sr = new System.IO.StringReader( rsaProvider.ToXmlString(true));

            RSAKeyValue rsaKey = (RSAKeyValue)formater.Deserialize(sr);  // 字符串形式
            RSAParameters rsaParameters = rsaProvider.ExportParameters(true);  // 字节数组形式
        }
    }

 1             RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();
 2 
 3             XmlSerializer formater = new XmlSerializer(typeof(RSAKeyValue));
 4             StringReader sr = new System.IO.StringReader(rsaProvider.ToXmlString(true));
 5 
 6             RSAKeyValue rsaKey = (RSAKeyValue)formater.Deserialize(sr);  // 字符串形式
 7             RSAParameters rsaParameters = rsaProvider.ExportParameters(true);  // 字节数组形式
 8 
 9             BigInteger bi_e = new BigInteger(new BigInteger(rsaParameters.Exponent).ToHexString(), 16);
10             BigInteger bi_d = new BigInteger(new BigInteger(rsaParameters.D).ToHexString(), 16);
11             BigInteger bi_n = new BigInteger(new BigInteger(rsaParameters.Modulus).ToHexString(), 16);
12 
13 
14             string val = "hello";
15             BigInteger bi_data = new BigInteger(Encoding.Default.GetBytes(val), 5);
16             BigInteger bi_encrypted = bi_data.modPow(bi_e, bi_n);
17             BigInteger bi_decrypted = bi_encrypted.modPow(bi_d, bi_n);
18 
19             string temp = Encoding.Default.GetString(bi_decrypted.getBytes());

1             string m = new BigInteger(rsaParameters.Modulus).ToHexString();
2             string exp = new BigInteger(rsaParameters.Exponent).ToHexString();

1             string publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQClrBWWPtAD3KsZvgyHYh5u2yTsuX6iI+vI+aGb7xBKdc8r9Dliuyc7a5thUEaJI8ZHDLXeDp5WnEJmW6a3/XKnvQNrAr6iIrtqvduIaFCgWLb2ZioBR1ODKe2o3dklsizsj66LIz9TFWL0hb7MXWQDEAd+IK4BaQ+OAr9vBtF7dwIDAQAB";
2 
3 
4             string privateKey = "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";