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我有一个 WPF Popup 控件,它有一个自定义控件作为其子控件。显然,当弹出窗口打开时加载孩子,并在弹出窗口关闭时卸载。然而,当孩子被加载时,还有大量的工作要做,所以我想保持它的加载。
我怎样才能做到这一点?