using System;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    public static void Main()

    {

        var ApplicationId="356674d2-e9f6-4475-a9ec-0d03bc2f644d";

        Console.WriteLine(Encryption(ApplicationId));

    }

         public static string Encryption(string strText)

        {

            var RequestDate = DateTime.Now - Convert.ToDateTime("01/01/1900 0:0:00 AM");

            var Totalmin = RequestDate.TotalMinutes.ToString("R");

            var toEncrypt = string.Concat(strText, Totalmin);//  $"{strText}{Totalmin}";

            var publicKey = "<RSAKeyValue><Modulus>vtNdLCdnkDAElOR8aVRCH6yB76mDo5OlRx6nekrRrM6/aj1nMJtitmG05eXCYoNgsoXURiPK67ZsvB+/tAm0mh6cqp+JB4REtNMJoqFbq4a+Vyct/mst+ALJOFR3LWxHkH9JR2gnHIDgU+x4ogS7GlWhz71fX2hghHjzGVvaMj5l6JcHDFl7FKcU1Ktbf7rooMDKNsvGkYgayR3dgrxPrHF6C3Qudy4QnRM8C0fzGWOk8YsdySaO0lMKj6/pwNLhJwR/Lpn9WvXU59cQOqHIGV9pGp7LLRp1T3xgJnmodha2skus0FR9ilwYlIaSin9q0DPGZoyX7GAUSU68fhkLQQ==</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";//public key here <---

            var testData = Encoding.UTF8.GetBytes(toEncrypt);

​

​

​

           using (var rsa = new RSACryptoServiceProvider(2048))

            {

                try

                {

                    // client encrypting data with public key issued by server                    

                    rsa.FromXmlString(publicKey.ToString());

​

​

​

                   var encryptedData = rsa.Encrypt(testData, true);

​

​

​

                   var base64Encrypted = Convert.ToBase64String(encryptedData);

​

​

​

                   return base64Encrypted;

                }

                finally

                {

                    rsa.PersistKeyInCsp = false;

                }

            }

        }

}