LINQ to SQL - Detach Entities

namespace Detach
{
    public partial class Order : LinqEntityBase
    {
        public override void Detach()
        {
            if (null == PropertyChanging)
                return;

            PropertyChanging = null;
            PropertyChanged = null;

            this._LineItems = Detach(this._LineItems, attach_LineItems, detach_LineItems);
            this._OrderStatus = Detach(this._OrderStatus, attach_OrderStatus, detach_OrderStatus);
        }
    }

    partial class LineItem : LinqEntityBase
    {
        public override void Detach()
        {
            if (null == PropertyChanging)
                return;

            PropertyChanging = null;
            PropertyChanged = null;

            this._Order = Detach(this._Order);
        }

    }

    partial class OrderStatus : LinqEntityBase
    {
        public override void Detach()
        {
            if (null == PropertyChanging)
                return;

            PropertyChanging = null;
            PropertyChanged = null;

            this._Order = Detach(this._Order);
        }

    }

    partial class Supplier : LinqEntityBase
    {
        public override void Detach()
        {
            if (null == PropertyChanging)
                return;

            PropertyChanging = null;
            PropertyChanged = null;

            this._Items = Detach(this._Items, this.attach_Items, this.detach_Items);
        }
    }

    partial class Item : LinqEntityBase
    {
        public override void Detach()
        {
            if (null == PropertyChanging)
                return;

            PropertyChanging = null;
            PropertyChanged = null;

            this._Product = Detach(this._Product);
            this._Supplier1 = Detach(this._Supplier1);
        }
    }

    partial class Category : LinqEntityBase
    {
        public override void Detach()
        {
            if (null == PropertyChanging)
                return;

            PropertyChanging = null;
            PropertyChanged = null;

            this._Products = Detach(this._Products, attach_Products, detach_Products);

        }
    }

    partial class Product : LinqEntityBase
    {
        public override void Detach()
        {
            if (null == PropertyChanging)
                return;

            PropertyChanging = null;
            PropertyChanged = null;

            this._Category = Detach(this._Category);
            this._Items = Detach(this._Items, attach_Items, detach_Items);
            this._Descn = Detach(this._Descn);
        }
    }
}