private void OnVisibleChanged(object sender, EventArgs e)
        {
            if (this.Visible)
            {
                Porto_Missioni_Panel.Hide();
                Porto_SelezioneCarte_Panel.Hide();

                //deseleziona tutto
                for (int i = 0; i < isSelected.Length; i++)
                {
                    isSelected[i] = false;
                }

                nCarteSelezionate = 0;

                Porto_Selected1_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected2_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected3_PB.BackgroundImage = Resources.emptyCheckBox;

                Porto_Selected4_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected5_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected6_PB.BackgroundImage = Resources.emptyCheckBox;

                Porto_Selected7_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected8_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected9_PB.BackgroundImage = Resources.emptyCheckBox;

                Porto_Selected10_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected11_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected12_PB.BackgroundImage = Resources.emptyCheckBox;

                Porto_Selected13_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected14_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected15_PB.BackgroundImage = Resources.emptyCheckBox;

                Porto_Selected16_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected17_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected18_PB.BackgroundImage = Resources.emptyCheckBox;

                Porto_Selected19_PB.BackgroundImage = Resources.emptyCheckBox;
                Porto_Selected20_PB.BackgroundImage = Resources.emptyCheckBox;
            }
        }
 private void Porto_SelCarBack_Button_Click(object sender, EventArgs e)
 {
     Porto_SelezioneCarte_Panel.Hide();
 }