在UserControl中，定义集合属性时，如果直接使用List是检测不到在属性框中的列表修改变化的，可以通过 ObservableCollection() 实现

1、定义类

[Serializable]    public class Menu : INotifyPropertyChanged    {        private string _Fa;        public string MenuName        {            get { return _Fa; }            set            {                if (_Fa != value)                {                    _Fa = value;                    RaisePropertyChangedEvent("Fa");                }            }        }        private Image _Fb;        public Image Image        {            get { return _Fb; }            set            {                if (_Fb != value)                {                    _Fb = value;                    RaisePropertyChangedEvent("Fb");                }            }        }        public event PropertyChangedEventHandler PropertyChanged;        private void RaisePropertyChangedEvent(string name)        {            if (this.PropertyChanged != null)            {                this.PropertyChanged(this, new PropertyChangedEventArgs(name));            }        }        }

2、实现

private ObservableCollection
     
       _menus = new ObservableCollection
      
       ();
      
     

[Browsable(true)][Description("菜单")][DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]public ObservableCollection
     
       Menus{    get {  return _menus; }    set {        _menus = value;        MessageBox.Show("ceshi");//这里检测不到    }}private void FormHeader_Load(object sender, EventArgs e){    GenerateUserPhoto();    Menus.CollectionChanged += Menus_CollectionChanged; ;}private void Menus_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e){    flowLayoutPanel1.Controls.Clear();    for (int i = 0; i < Menus.Count; i++)    {        Button button=new Button();        button.Text = Menus[i].MenuName;        flowLayoutPanel1.Controls.Add(button);    }}
     

这样，在属性列表中修改Menus，显示区域就会实时变化，添加相应的菜单按钮个数。