C#

public sealed class ClientLibraryWrapper
{
	AppDomain clientDomain;
	ServerB.Client.EntryPoint client;
	
	public ClientLibraryWrapper
	{
		this.clientDomain = AppDomain.CreateDomain("ServerBClientDomain");
		Assembly clientAssembly = Assembly.LoadFile(Environment.CurrentDirectory + @"\ServerB.Client.dll");
        this.clientDomain.Load(clientAssembly.FullName);
        
        Object obj = mhsClientDomain.CreateInstanceAndUnwrap(clientAssembly.FullName, "ServerB.Client.EntryPoint");
        this.client = (ServerB.Client.EntryPoint)obj;
	}
	
	public int ServerBMethod()
	{
		this.client.ServerBMethod();
	}
}

public sealed class EntryPoint : MarshalByRefObject
{
	public override object InitializeLifetimeService()
	{
		return null;
	}
	
	public int ServerBMethod()
	{
		return 1;
	}
}

CspParameters cspParam = new CspParameters();
            cspParam.Flags = CspProviderFlags.UseMachineKeyStore;
            cspParam.KeyContainerName = "MyContainer";
            cspParam.KeyNumber = 1;

            System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(cspParam);
            RSAParameters privatePar = RSA.ExportParameters(true);
            RSAParameters publicPar = RSA.ExportParameters(false);
            // Encryption based on Public Key
            Byte[] EncryptedStrAsByt;
            RSA.ImportParameters(publicPar);
            String str = "HelloThere";
            EncryptedStrAsByt = RSA.Encrypt(System.Text.Encoding.Unicode.GetBytes(str), false);
            // As a "proof of concept", to DECRYPT the same data, but now using the Private key:

            //---Load the private key---            
            RSA.ImportParameters(privatePar );
            //below this line i pass EncryptedStrAsByt directly as parameter--> see yours
            Byte[] DecryptedStrAsByt = RSA.Decrypt(EncryptedStrAsByt, false);
            string DecryptedStrAsString = System.Text.Encoding.Unicode.GetString(DecryptedStrAsByt);

dhaim
programming is a hobby that make some money as side effect

string invalidChar = @"' ` "" # ";
string[] invChar = invalidChar.Split(' ');

char[] invalidCharacters = { '"', ',', '$', '\'' };