does nulling a System.Threading.Timer stop it?

If I have an active System.Threading.Timer and I set it to null, is it stopped?

I realize that it is more proper to call .Dispose() but I would like an answer to the question as written.

public class Foo
{
   private System.Threading.Timer _timer;
   public Foo()
   {
      // initialize timer
   }

   public void KillTimer()
   {
      _timer=null;
   }
}

Update:

After much back and forth about whether setting a single reference to a System.Threading.Timer to null will indeed result stopping it have shown that

1. there are no lingering references, e.g. events list, as a threading timer takes a sinlge callback and does not expose events.
2. that if GC collects, the finalizer will indeed dispose the TimerBase and stop the timer.

spike

using System;
using System.Threading;

namespace SO_3597276
{
    class Program
    {
        private static System.Threading.Timer _timer;

        static void Main(string[] args)
        {
            _timer = new Timer((s) => Console.WriteLine("fired"), null, 1000, Timeout.Infinite);
            _timer = null;
            GC.Collect();
            Console.ReadKey();
        }
    }
}

The timer callback is not called. Remove GC.Collect() and the callback is called.

Thanks all.