.Net中使用RSA加密解密方法

/// <summary>
        /// RSA 加密
        /// </summary>
        public static string EncryptByRSA(this string source)
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            rsa.FromXmlString(PublicRSAKey);
            var cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(source), false);
            return Convert.ToBase64String(cipherbytes);
        }

        /// <summary>
        /// RSA解密
        /// </summary>
        public static string DecryptByRSA(this string source)
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            rsa.FromXmlString(PrivateRSAKey);
            var cipherbytes = rsa.Decrypt(Convert.FromBase64String(source), false);
            return Encoding.UTF8.GetString(cipherbytes);
        }

 【原文出处】 http://www.51aras.com/?id=28