如何显示WPF绑定的选定项目

C＃：

public void SetCompetition(Window wT1)
{
    //Add all the Copetition
    wT1._competition = new List<Competition>();
    wT1._competition.Add(new Competition { Logo = "3.png", Name = "test1", IsSelected = false });
    wT1._competition.Add(new Competition { Logo = "3.png", Name = "test2", IsSelected = false });
    wT1._competition.Add(new Competition { Logo = "3.png", Name = "test3", IsSelected = false });
    wT1._competition.Add(new Competition { Logo = "3.png", Name = "test4", IsSelected = false });

        wT1.cboSetupCompetition.ItemsSource = wT1._competition;
        wT1.cboSetupCompetition.Items.Refresh();
    }