private static void About_Click(object sender, EventArgs e)
{
AboutView aboutView = AboutView.GetInstance();
aboutView.Focus();
aboutView.Show();
}
public static AboutView GetInstance()
{
if (AboutViewSingleton == null) //双重锁定只需要一句判断就可以了
{
lock (locker) //线程锁
{
if (AboutViewSingleton == null) //判断类是否已经实例化
{
AboutViewSingleton = new AboutView();
}
}
}
return(AboutViewSingleton);
}
private void AboutView_Closed(object sender, EventArgs e)
{
AboutViewSingleton = null;
}
