Question

If a parameter is a reference to an object, will the asynchronous invocation be passed the reference or a copy of the object (by marshalling)?

Answer 1

As far as I’m aware, there’s no object marshalling that occurs just by calling a delegate asynchronously. Here’s some code to show an asynchronous delegate call, passing an object reference.

public class Car
{
    public string Model { get; set; }
}

public delegate void TransformHandler(Car car);

public static void Transform(Car car)
{
    car.Model = "Holden";
}

static void Main(string[] args)
{
    Car car = new Car();
    car.Model = "Ford";

    new TransformHandler(Transform).BeginInvoke(car, null, null);

    Thread.Sleep(100);

    Console.WriteLine(car.Model); // Prints "Holden", so it wasn't marshalled
}