'using' holds a reference to the object being disposed

gistfile1.cs

using System;

static class Program
{
    public static void Main()
    {
        using (new Slow()) ;
    }
}
    
class Slow : IDisposable
{
	~Slow()
	{
		Console.WriteLine("collected");
	}

    public void Dispose()
    {
        Console.WriteLine("start method");
        GC.Collect();
        GC.WaitForPendingFinalizers();
        Console.WriteLine("end method");
    }
}