using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        var rsa = new RSACryptoServiceProvider(2048);

var publicKey = rsa.ExportParameters(false);

var privateKey = rsa.ExportParameters(true);

        string plainText="This is an example for asymmetric key.";

        string encryptText=Encrypt(plainText,publicKey);

        Console.WriteLine("Encrypted Text : "+encryptText);

        string decryptText=Decrypt(encryptText,privateKey);

        Console.WriteLine("Decrypted Text : "+decryptText);

    }

    public static string Encrypt(string data, RSAParameters rsaParameters)

  {

    using(var rsaCryptoServiceProvider = new RSACryptoServiceProvider())

    {

      rsaCryptoServiceProvider.ImportParameters(rsaParameters);

      var byteData = Encoding.UTF8.GetBytes(data);

      var encryptedData = rsaCryptoServiceProvider.Encrypt(byteData, false);

      return Convert.ToBase64String(encryptedData);

    }

  }

  public static string Decrypt(string cipherText, RSAParameters rsaParameters)

  {

    using(var rsaCryptoServiceProvider = new RSACryptoServiceProvider())

    {

      var cipherDataAsByte = Convert.FromBase64String(cipherText);

      rsaCryptoServiceProvider.ImportParameters(rsaParameters);

      var encryptedData = rsaCryptoServiceProvider.Decrypt(cipherDataAsByte, false);

      return Encoding.UTF8.GetString(encryptedData);

    }

  }

}