using System;

using System.Security.Cryptography;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        try

        {

            // Public key in XML format

            string publicKeyXml = @"<?xml?><RSAKeyValue><Modulus>pF3jeHhBwjAm+Z+LIQcGTTPdRY4dty7pehmXd+rFHjeqovisu7/ARJaojWXSvOLqGlJ00+dI2JhIbbzzgIpAgMa+jQjqJI/zodjYQOWS5Om5WNnb6OFHjlPuh1b41R1Nn7UVh2AFtdvkTJHMNhQowZtJRjpXsLAQosuz//QqswiKPTbsOERkaFps0X/aRWeWDS/HnN998+y0epgMft6OmdVIAhcXs/4Wg4V3UXa4m6Wokg+B7I9AlG/7dRhIS/jU/ynHlLat5t5W9AAFdHZbubryTQszm1fTtOa9bn46xYEV5gnIW6/76oIXVNBY52J71cNf8snLvECLzwyidiiRJHnXLY/cr4plT5RcXMiso/XDikwVjymzVmEJVvze8kmEbn4YILl2k006bs19R1BgMNVkCTok7lI115p0XX75P6ZHX1Q0+FABumhWUs0T69acW+j73shdonGkxz1kO6EepSCcFn7UBcNxgGr7dXSraKdXOInv4vK6h9wJ/iFBGThu0iJ7W6172VVFBGGxjTEw+GadWE39XY/TpnKgLMtPcFs9FK66MSWZb0D25y4dUj/RinHhKPKtZ7oH9qxX6txzAyVcX1y22BmiwjNYhZNqtTpyPTClVpzXQnokIeu1vcanf2RWmpKtXYfMskEsv2hO4B/MZ5ZcSVW3PdbngUP9uP0=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";

​

            // Text to encrypt

            string plaintext = "Vacations24";

​

            // Encrypt the plaintext using the public key

            byte[] encryptedData = EncryptWithPublicKey(plaintext, publicKeyXml);

​

            // Convert the encrypted data to Base64

            string encryptedBase64 = Convert.ToBase64String(encryptedData);

​

            System.Console.WriteLine("Encrypted Data (Base64): " + encryptedBase64);

        }

        catch (Exception ex)

        {

           System.Console.WriteLine("An error occurred: " + ex.Message);

        }

    }

​

    static byte[] EncryptWithPublicKey(string plaintext, string publicKeyXml)

    {

        using (var rsa = new RSACryptoServiceProvider())

        {

            // Load the public key

            rsa.FromXmlString(publicKeyXml);

​

            // Convert the plaintext to bytes

            byte[] plaintextBytes = Encoding.UTF8.GetBytes(plaintext);

​

            // Encrypt using RSA with OAEP padding

            return rsa.Encrypt(plaintextBytes, true); // true = OAEP padding

        }

    }

}

​