Add ListItemCollection Property To Custom Gridview

   private ListItemCollection m_Items=null;

   [DesignerSerializationVisibility(DesignerSerializationVisibility.Content),  

    NotifyParentProperty(true), 

    PersistenceMode(PersistenceMode.InnerProperty)

     ] 

        public virtual ListItemCollection Items

        {

            get

            {

                if (this.m_Items == null)

                {

                    this.m_Items = new ListItemCollection ();

                   

                }

                 return this.m_Items;

            }

        }