GC。KeepAlive与使用

在他的 article about preventing multiple instances

static void Main()                  // args are OK here, of course
{
    bool ok;
    m = new System.Threading.Mutex(true, "YourNameHere", out ok);

    if (! ok)
    {
        MessageBox.Show("Another instance is already running.");
        return;
    }

    Application.Run(new Form1());   // or whatever was there

    GC.KeepAlive(m);                // important!
}

他解释说,GC。需要KeepAlive(m)来防止垃圾收集器提前收集互斥体,因为没有对它的额外引用。

我的问题是:将互斥体包装在use中会做同样的事情吗?也就是说,以下情况是否也会阻止GC从我下面拔出地毯?

static void Main()                  // args are OK here, of course
{
    bool ok;
    using (var m = new System.Threading.Mutex(true, "YourNameHere", out ok))
    {
        if (! ok)
        {
            MessageBox.Show("Another instance is already running.");
            return;
        }

        Application.Run(new Form1());   // or whatever was there
    }
}

我的直觉反应是,使用会奏效,因为使用(应该)相当于:

Mutex m = new System.Threading.Mutex(true, "YourNameHere", out ok);
try
{
    // do stuff here
}
finally
{
    m.Close();
}