Remoting—reference versus value/AppDomain remoting

output.txt

5
2

Program.cs

// Inspired by http://stackoverflow.com/q/13729089/429091

using System;

class Program
{
    static void Main(string[] args)
    {
        var appDomain = AppDomain.CreateDomain("Temp AppDomain", null, AppDomain.CurrentDomain.SetupInformation);
        try
        {
            var instance = appDomain.CreateInstanceAndUnwrap<RemoteRef>();
            var value = new RemoteValue { Value = 2, };
            instance.DoSomething(value);
            Console.WriteLine(value.Value);
        }
        finally
        {
            AppDomain.Unload(appDomain);
        }
    }
}

static class AppDomainExtensions
{
    public static T CreateInstanceAndUnwrap<T>(
        this AppDomain appDomain)
        where T : MarshalByRefObject
    {
        return (T)appDomain.CreateInstanceAndUnwrap(typeof(T).Assembly.FullName, typeof(T).FullName);
    }
}

class RemoteRef
    : MarshalByRefObject
{
    public int Value { get; set; }
    public void DoSomething(RemoteValue value)
    {
        value.Value += 3;
        Console.WriteLine(value.Value);
    }
}

// Won’t be able to access an instance of this remotely using CreateInstanceAndUnwrap
// because RPCs can only be made via MarshalByRefObjects. But you could pass this
// as a parameter to an RPC.
[Serializable]
class RemoteValue
{
    public int Value { get; set; }
}