private void GridBC_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { if (tf == false) //chua ai win { int row, col; Point a = LayToaDo(sender, e); row = Convert.ToInt32(a.Y); col = Convert.ToInt32(a.X); if (check[row, col] == 0) //o chua danh // X = 1 // O = 2 { try { if (player2.GetClick() == true) { player2.SetClick(false); player1.SetClick(true); } else { player2.SetClick(true); player1.SetClick(false); } switch (state) { case 1: { playPvP(a, row, col, player1, player2); break; } case 2: { playPvB(a, row, col, player1, player2); break; } } } catch (Exception) { } } //check here tf = isWin(row, col); } }