public ResourceHolderBase(UnmanagedResource uResource, ManagedResource mResource)
        {
            _disposed = false;

            _uResource = uResource;
            _mResource = mResource;
        }
        public ResourceHolderDerived(UnmanagedResource uResource, ManagedResource mResource, UnmanagedResource uResourceOwn, ManagedResource mResourceOwn) : base(uResource, mResource)
        {
            _disposed = false;

            _uResourceOwn = uResourceOwn;
            _mResourceOwn = mResourceOwn;
        }