Winform与WPF异步修改控件属性

Winform方式：
if (this.InvokeRequired)
{
    this.Invoke(
        new Action (
            delegate(Form form1)
            {
                lblTip.Content = msg;
            })
        , this
    );
}
WPF方式：
this.Dispatcher.BeginInvoke((Action)delegate()
{
    lblTip.Content = msg;
});