Getting address of value or reference

   public static class AddressHelper
    {
        private static object mutualObject;
        private static ObjectReinterpreter reinterpreter;

        static AddressHelper()
        {
            AddressHelper.mutualObject = new object();
            AddressHelper.reinterpreter = new ObjectReinterpreter();
            AddressHelper.reinterpreter.AsObject = new ObjectWrapper();
        }

        public static IntPtr GetAddress(object obj)
        {
            lock (AddressHelper.mutualObject)
            {
                AddressHelper.reinterpreter.AsObject.Object = obj;
                IntPtr address = AddressHelper.reinterpreter.AsIntPtr.Value;
                AddressHelper.reinterpreter.AsObject.Object = null;
                return address;
            }
        }

        public static T GetInstance<T>(IntPtr address)
        {
            lock (AddressHelper.mutualObject)
            {
                AddressHelper.reinterpreter.AsIntPtr.Value = address;
                return (T)AddressHelper.reinterpreter.AsObject.Object;
            }
        }

        // I bet you thought C# was type-safe.
        [System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Explicit)]
        private struct ObjectReinterpreter
        {
            [System.Runtime.InteropServices.FieldOffset(0)] public ObjectWrapper AsObject;
            [System.Runtime.InteropServices.FieldOffset(0)] public IntPtrWrapper AsIntPtr;
        }

        private class ObjectWrapper
        {
            public object Object;
        }

        private class IntPtrWrapper
        {
            public IntPtr Value;
        }
    }