private void button2_Click(object sender, EventArgs e) { string TakenKey = CryptKey.Text; string TakenIV = CryptIV.Text; if (TakenKey.Length != 32 && TakenIV.Length != 16) { MessageBox.Show("Invalid key entry. Key must be 32 character"); } else { AesCrypt.setKey(TakenKey); AesCrypt.setIV(TakenIV); } }