设计模式 -- 我的记录

窗体
-------------------------------------------
private static SortManage instance;

public static SortManage GetInstance()
{
    //当窗体关闭后instance不为NULL,但已经Dispose,不能访问其内容,所以这种情况下也行重新构造
    if (instance == null || instance.IsDisposed)
    {
        instance = new SortManage();
    }
    return instance;
}


private SortManage()
{
    InitializeComponent();
}

父窗体
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SortManage sortManage = SortManage.GetInstance();
sortManage.TopMost = true;
sortManage.Show();