private void detach_ProductVendors(ProductVendor entity)
		{
			this.SendPropertyChanging();
			entity.Vendor = null;
		}
		private void attach_ProductVendors(ProductVendor entity)
		{
			this.SendPropertyChanging();
			entity.Vendor = this;
		}
 partial void UpdateProductVendor(ProductVendor instance);
 partial void DeleteProductVendor(ProductVendor instance);
 partial void InsertProductVendor(ProductVendor instance);