private void btnDecrypt_Click_1(object sender, EventArgs e) { if (richTextBox1.Text == string.Empty) { MessageBox.Show("Please give a valid textfile.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } else { stopwatch.Start(); Decryption decryption = new Decryption(); string encryptedmessage; encryptedmessage = decryption.GetBinary(richTextBox1.Text); richTextBox2.Lines = decryption.DecryptedMessage(encryptedmessage); message = richTextBox2.Text; string SetenceString = message; var result = string.Join(" ", SetenceString.Split(' ').Distinct()); richTextBox2.Text = result; stopwatch.Stop(); int duration = Convert.ToInt32(stopwatch.ElapsedMilliseconds); Communications com = new Communications(); Form1 form1 = new Form1(); int id = form1.GetUserID(); if (richTextBox2.Text == string.Empty) { MessageBox.Show("Please give a valid textfile.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } else { com.AddCommunication(id, duration, message); } } }