这个网上有个例子

 

    private void Button_Click(object sender, RoutedEventArgs e)

    {

        using (dynamic app = AutomationFactory.CreateObject("Excel.Application"))

        {

            using (dynamic book = app.Workbooks.Add())

            {

                using (dynamic sheet = app.ActiveSheet())

                {

}

                book.Close();

            }

            app.Quit();

        }; 

        GC.Collect();

    }

这个是可以回收资源的. 但是如果把 dynamic book = app.Workbooks.Add() 该为 dynamic workBooks = excel.Workbooks._Open(@"D:\test.xls", Type.Missing,

                    Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,

                    Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing)

这时名次运行完, 都会有一个Excel进程不能释放.(勉强可以接受). 以后再试试其它方法.