C# autodispose from constructor

AutoDispose.cs

public class Guard : IDisposable
{
    private List<IDisposable> toDispose = new List<IDisposable>();

    public void Add(IDisposable d) { toDispose.Add(d); } 
    public void Dispose() { foreach(var x in toDispose) x.Dispose(); }
    public void Discharge() { toDispose.Clear(); }

    public static void Do(Action<Guard> a)
    {
        using(var g = new Guard()) { a(g); g.Discharge(); }
    }
    public static T Do<T>(Func<Guard,T> a) { /* analogously */ }
}

public static class DisposeExtensions 
{
    public static T RegisterForDispose<T>(this T x, Guard g) where T : IDisposable
    {
        g.Add(x);
        return x;
    }
}

public class Foo
{
    public Foo(...)
    {
        Guard.Do(g => 
        {
            this.foo = new SomeResource().RegisterForDispose(g)
                .GetDerivedResource().RegisterForDispose(g)
                .GetAnotherDerived().RegisterForDispose(g); // None of the chain will leak.

            this.bar = ...;

            ...
        });
    }
}