如何根据我的数据绑定选择WPF ComboBox中的项目？

xmlns:system="clr-namespace:System;assembly=mscorlib"

public class MyViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    private void NotifyPropertyChanged([CallerMemberName] string propertyName = "")
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    private List<string> _myDataList;
    public List<string> MyDataList
    {
        get { return _myDataList; }
        set
        {
            _myDataList = value;
            NotifyPropertyChanged();
        }
    }

    private object _mySelectedItem;
    public object MySelectedItem
    {
        get { return _mySelectedItem; }
        set
        {
            _mySelectedItem = value;
            NotifyPropertyChanged();
        }
    }
}

public class MyViewModel
{
    public MyViewModel()
    {
        MyDataList = new List<string> { "Item 1", "Item 2", "Item 3" };
        MySelectedItem = MyDataList[1]; // Select "Item 2" by default
    }
}