static void Main(string[] args)
{
RSACipher rsa = new RSACipher();
(var publicKey, var privateKey) = rsa.GenerateRSAPair();
BigInteger secretText = BigInteger.Parse("13483148314831849481394811231232121");
if (secretText > publicKey.N)
{
throw new Exception("Too big");
}
var crypt = rsa.EncryptRSA(secretText, publicKey);
var decrypt = rsa.DecryptRSA(crypt, privateKey);
Console.WriteLine("text: {0}\n crypted: {1}\n decrypted: {2}", secretText, crypt, decrypt);
}