In C# you can use the class RSACryptoServiceProvider using the following public key ;

BgIAAACkAABSU0ExAAQAAAEAAQBZ3myd6ZQA0tUXZ3gIzu1sQ7larRfM5KFiYbkgWk+jw2VEWpxpNNfDw8M3MIIbbDeUG02y/ZW+XFqyMA/87kiGt9eqd9Q2q3rRgl3nWoVfDnRAPR4oENfdXiq5oLW3VmSKtcBl2KzBCi/J6bbaKmtoLlnvYMfDWzkE3O1mZrouzA==

After the encryption, the byte array (byte[]) must be converted to base64.

 

Here you find a full console program example in C# (please replace the password to encrypt yours) :

#region

using System;
using System.Security.Cryptography;
using System.Text;

#endregion

namespace WinBIZCloudAPIEncrypt
{
  public class Program
  {
    #region Public Methods

    public static string Encrypt(string publicKey, string data)
    {
      var cspParams = new CspParameters {ProviderType = 1};
      var rsaProvider = new RSACryptoServiceProvider(cspParams);
      rsaProvider.ImportCspBlob(Convert.FromBase64String(publicKey));
      var plainBytes = Encoding.UTF8.GetBytes(data);
      var encryptedBytes = rsaProvider.Encrypt(plainBytes, false);
      var encryptedString = Convert.ToBase64String(encryptedBytes);
      return encryptedString;
    }

    public static void Main(string[] args)
    {
      var publicKey = "BgIAAACkAABSU0ExAAQAAAEAAQBZ3myd6ZQA0tUXZ3gIzu1sQ7larRfM5KFiYbkgWk+jw2VEWpxpNNfDw8M3MIIbbDeUG02y/ZW+XFqyMA/87kiGt9eqd9Q2q3rRgl3nWoVfDnRAPR4oENfdXiq5oLW3VmSKtcBl2KzBCi/J6bbaKmtoLlnvYMfDWzkE3O1mZrouzA==";
      var passwordToEncrypt = "Password1!";
      var passwordEncrypted = Encrypt(publicKey, passwordToEncrypt);
      Console.WriteLine(passwordEncrypted);
      Console.ReadKey();
    }

     #endregion
  }
}

 

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