DotNetEden

 // 新建一个放扩展方法的类
public static class ExtensionMethod
{
    public static TResult SafeInvoke<T, TResult>(this T isi, Func<T, TResult> call) where T : ISynchronizeInvoke
    {
        if (isi.InvokeRequired) { 
            IAsyncResult result = isi.BeginInvoke(call, new object[] { isi }); 
            object endResult = isi.EndInvoke(result); return (TResult)endResult; 
        }
        else
        {
            return call(isi);
        }
    }

    public static void SafeInvoke<T>(this T isi, Action<T> call) where T : ISynchronizeInvoke
    {
        if (isi.InvokeRequired)
        {
            isi.BeginInvoke(call, new object[] { isi });
        }
        else
        {
            call(isi);
        }
    }
}

// 在类里这样应用 
private void button1_Click(object sender, EventArgs e)
{

    Thread thread = new Thread(new ThreadStart(startCalculation));
    thread.Start();
}

private void startCalculation()
{
    button1.SafeInvoke(d => d.Enabled = false);

    for (double i = 0; i <= 10000000000; i++)
    {
        string textForLabel = (i) + "%";

        lblProcent.SafeInvoke(d => d.Text = textForLabel);
        var i1 = i;
        progressBar1.SafeInvoke(d => d.Value = 10);
        string labelText = lblProcent.SafeInvoke(d => d.Text);

    }
    this.SafeInvoke(d => d.refreshTree());
    button1.SafeInvoke(d => d.Enabled = true);
}

private void refreshTree()
{
    Thread.Sleep(10000);
    this.treeView1.ExpandAll();
    this.treeView1.Nodes[0].Nodes[1].Remove();
}

NSAutoreleasePool ＊pool;
pool = [[NSAutoreleasePool alloc] init];
 
//omitted
    
[pool drain];
return 0;

@autoreleasepool{
    //omitted.
}