Customary Functions of GridView in ASP.NET 3.5

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//                          The Common Usage For GridView (Version 7.0)
//                                    Author: Behrouz Rad
//                         Copyright © 2006 - 2009, All rights reserved.
//                        feel free to contact me: behrouz.rad@gmail.com
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

namespace BehooGridViewFunctions.BLL.Orders
{
    using System.Collections.Generic;
    using BehooGridViewFunctions.DAL;
    using BehooGridViewFunctions.Entities;

    public class ChildPiece : BaseOrder
    {
        #region Constructor

        ///////////////////////////////////////////////////
        // Constructor
        ///////////////////////////////////////////////////

        public ChildPiece(int id, int privateId, string subPieceName)
        {
            this.ID = id;
            this.PrivateID = privateId;
            this.SubPieceName = subPieceName;
        }
        #endregion

        #region Properties

        ///////////////////////////////////////////////////
        // Properties
        ///////////////////////////////////////////////////

        public int ID { get; set; }
        public int PrivateID { get; set; }
        public string SubPieceName { get; set; }

        #endregion

        #region Public Static Methods

        ///////////////////////////////////////////////////
        // Public Static Methods
        ///////////////////////////////////////////////////

        public static List<ChildPiece> GetChildPieces(int parentId)
        {
            List<EntityChildPiece> childPieces = SiteProvider.Orders.GetChildPieces(parentId);
            List<ChildPiece> childPieceList = GetChildPieceListFromEntityChildPieceList(childPieces);

            return childPieceList;
        }

        #endregion

        #region Private Static Methods

        ///////////////////////////////////////////////////
        // Private static Methods
        ///////////////////////////////////////////////////

        private static ChildPiece GetChildPieceFromEntityChildPiece(EntityChildPiece childPiece)
        {
            if (childPiece == null)
            {
                return null;
            }
            else
            {
                return new ChildPiece(childPiece.ID, childPiece.PrivateID, childPiece.SubPieceName);
            }
        }

        private static List<ChildPiece> GetChildPieceListFromEntityChildPieceList(List<EntityChildPiece> childPieceList)
        {
            List<ChildPiece> childPieces = new List<ChildPiece>();
            foreach (EntityChildPiece childPiece in childPieceList)
            {
                childPieces.Add(GetChildPieceFromEntityChildPiece(childPiece));
            }

            return childPieces;
        }

        #endregion

        #region Public Instance Methods

        ///////////////////////////////////////////////////
        // Public Instance Methods
        ///////////////////////////////////////////////////

        public override string ToString()
        {
            return this.ID + "," + this.SubPieceName + "," + this.PrivateID;
        }

        #endregion
    }
}