namespace WindowsFormsApplication1
{
    public partial class Myform : Form
    {
        public BindingList跨线程绑定使用SynchronizationContext()
        {
            InitializeComponent();
            Initial();
        }

        public UiBindList<OBJ> _list { get; set; }

        private void Initial()
        {
            _list = new UiBindList<OBJ> { SynchronizationContexts = SynchronizationContext.Current };
            dataGridView1.DataBindings.Add("DataSource", this, "_list", false, DataSourceUpdateMode.OnPropertyChanged);

            new Thread(() =>
            {
                while (true)
                {
                    Thread.Sleep(1000);
                    _list.Add(new OBJ { Name = "C#" });
                }
            })
            {
                IsBackground = true,
            }
            .Start();
        }
    }

    public class UiBindList<T> : BindingList<T>
    {
        public SynchronizationContext SynchronizationContexts { get; set; }

        public void Excute(Action action, object state = null)
        {
            if (SynchronizationContexts == null)
                action();
            else
                SynchronizationContexts.Post(p => action(), state);
        }

        public new void Add(T item)
        {
            Excute(() => base.Add(item));
        }

        public new void Remove(T item)
        {
            Excute(() => base.Remove(item));
        }
    }

    public class OBJ { public string Name { get; set; } }

在Add方式中 报错！！对象的当前状态使该操作无效。

请问高手是怎么回事！！！