private void Start_Click(object sender, EventArgs e) { int errorCode = sbService.CheckPlayer(textPlayer1.Text, textPlayer2.Text); if (errorCode == 0) { PlayerOne = new Player(); PlayerTwo = new Player(); PlayerOne.Name = textPlayer1.Text; PlayerTwo.Name = textPlayer2.Text; PlayerName1.Text = ""; PlayerName2.Text = ""; ScoreResult2.Text = "--"; ScoreResult1.Text = "--"; IsStart = true; InitControl(); InitLayout(); } else { if (errorCode == 1) { MessageBox.Show("Please Fill the Player's Name", "Alert", MessageBoxButtons.OK); } if (errorCode == 2) { MessageBox.Show("Players' Name can't be the Same", "Alert", MessageBoxButtons.OK); } } }