Pointer.cs

using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Security;

namespace System.Reflection
{
    [Serializable]
    [CLSCompliant(false)]
    [ComVisible(true)]
    public sealed class Pointer : ISerializable
    {
        [SecurityCritical]
        private unsafe void* _ptr;

        private RuntimeType _ptrType;

        private Pointer()
        {
        }

        [SecurityCritical]
        private unsafe Pointer(SerializationInfo info, StreamingContext context)
        {
            _ptr = ((IntPtr)info.GetValue("_ptr", typeof(IntPtr))).ToPointer();
            _ptrType = (RuntimeType)info.GetValue("_ptrType", typeof(RuntimeType));
        }

        [SecurityCritical]
        public unsafe static object Box(void* ptr, Type type)
        {
            if (type == null)
            {
                throw new ArgumentNullException("type");
            }
            if (!type.IsPointer)
            {
                throw new ArgumentException(Environment.GetResourceString("Arg_MustBePointer"), "ptr");
            }
            RuntimeType runtimeType = type as RuntimeType;
            if (runtimeType == null)
            {
                throw new ArgumentException(Environment.GetResourceString("Arg_MustBePointer"), "ptr");
            }
            Pointer pointer = new Pointer();
            pointer._ptr = ptr;
            pointer._ptrType = runtimeType;
            return pointer;
        }

        [SecurityCritical]
        public unsafe static void* Unbox(object ptr)
        {
            if (!(ptr is Pointer))
            {
                throw new ArgumentException(Environment.GetResourceString("Arg_MustBePointer"), "ptr");
            }
            return ((Pointer)ptr)._ptr;
        }

        internal RuntimeType GetPointerType()
        {
            return _ptrType;
        }

        [SecurityCritical]
        internal unsafe object GetPointerValue()
        {
            return (IntPtr)_ptr;
        }

        [SecurityCritical]
        unsafe void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
        {
            info.AddValue("_ptr", new IntPtr(_ptr));
            info.AddValue("_ptrType", _ptrType);
        }
    }
}