Async disposal

AsyncDisposal.cs

async void Main()
{
    Console.WriteLine ("Before Using");
    await Async.Using(new Test(), t =>
    {
        Console.WriteLine ("In Using body");
        throw new Exception("Oops");
    });
    Console.WriteLine ("After Using");
}

class Test : IAsyncDisposable
{
    public async Task DisposeAsync()
    {
        Console.WriteLine ("Disposing...");
        await Task.Delay(1000);
        Console.WriteLine("Disposal complete");
    }
}

public interface IAsyncDisposable
{
    Task DisposeAsync();
}

public static class Async
{
    public static async Task Using<TResource>(TResource resource, Func<TResource, Task> body)
        where TResource : IAsyncDisposable
    {
        Exception exception = null;
        try
        {          
            await body(resource);
        }
        catch(Exception ex)
        {
            exception = ex;
        }
        await resource.DisposeAsync();
        if (exception != null)
        {
            var info = ExceptionDispatchInfo.Capture(exception);
            info.Throw();
        }
    }
}