RSA encryption in C#

I want to make a simple RSA encryption algorithm embedded in .Net by means of. How I see it:

1. Creating an RSA object.
2. We get the public and private keys from it, and save them.
3. We encrypt the message using the public key.
4. The message encrypted in clause 3 can be decrypted using a private key.

I sketched a quick demo for this, in it in TextBox1 is the text that I want encrypt, by clicking on button1 encryption occurs and the result is placed in textBox2; in textBox3, respectively, we can put the encrypted message, and by clicking on button2 decrypt it and see the result in textBox4.

Source code (RSAEn (- De)crypt methods taken from the MSDN site):

public partial class Form1 : Form
    {
        RSAParameters privateKey;
        RSAParameters publicKey;

        public Form1()
        {
            InitializeComponent();

            //Пункт 1
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
            //Пункт 2
            privateKey = RSA.ExportParameters(true);
            publicKey = RSA.ExportParameters(false);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            UnicodeEncoding byteConverter = new UnicodeEncoding();
            byte[] input = byteConverter.GetBytes(textBox1.Text);
            byte[] output;
            //Пункт 3
            output = RSAEncrypt(input, publicKey, false);

            textBox2.Text = byteConverter.GetString(output);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            UnicodeEncoding byteConverter = new UnicodeEncoding();
            byte[] input = byteConverter.GetBytes(textBox3.Text);
            byte[] output;
            //Пункт 4
            output = RSADecrypt(input, privateKey, false);

            textBox4.Text = byteConverter.GetString(output);
        }

        static public byte[] RSAEncrypt(byte[] DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
        {
                //Create a new instance of RSACryptoServiceProvider.
                RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

                //Import the RSA Key information. This only needs
                //toinclude the public key information.
                RSA.ImportParameters(RSAKeyInfo);

                //Encrypt the passed byte array and specify OAEP padding.  
                //OAEP padding is only available on Microsoft Windows XP or
                //later.  
                return RSA.Encrypt(DataToEncrypt, DoOAEPPadding);
        }

        static public byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
        {
            //Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            //Import the RSA Key information. This needs
            //to include the private key information.
            RSA.ImportParameters(RSAKeyInfo);

            //Decrypt the passed byte array and specify OAEP padding.  
            //OAEP padding is only available on Microsoft Windows XP or
            //later.  
            return RSA.Decrypt(DataToDecrypt, DoOAEPPadding);
        }
    }

It encrypts everything normally, but when decrypting it gives CryptographicException, " Additional information: The parameter was set incorrectly. " Googling the error did not give any results. What am I doing wrong?