برنامم یه کلاس به اسم GetNodes و یه متد داخلش به اسم GetNode داره داخل این متد هم از Node استفاده کردم که این نود از یک کلاس دیگه ای به نام Nodes ها استفاده کرده.

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Configuration;
<b> using Common_Layer;</b>
 
public class GetNodes
{
     
public ListNodes getNode(string UserTypeGuid, int status)
    { 
        SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrin  gs["ConStrings"].ConnectionString);
        try
        {
            using (SqlCommand command = new SqlCommand("SelectAllNodes", connection))
            {
                command.Parameters.AddWithValue("@UserTypeGuid", UserTypeGuid);
                command.Parameters.AddWithValue("@status", status);
                command.CommandType = CommandType.StoredProcedure;
 
                if (connection.State == ConnectionState.Closed)
                    connection.Open();
 
                ListNodes list = new ListNodes();
                using (SqlDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        Node temp = new Node();
                        temp.IDNode = new Guid(reader["IDNode"].ToString());
                        temp.ParentNodeID = new Guid(reader["ParentNodeID"].ToString());
                        temp.NodeName = reader["NodeName"].ToString();
                        temp.NodeCaption = reader["NodeCaption"].ToString();
                        temp.Periority = Int32.Parse(reader["Periority"].ToString());
                        temp.NavigateUrl = reader["NavigateUrl"].ToString();
                        temp.UserTypeID = reader["UserTypeID"].ToString();
                        //temp.Tni = reader["tni"].ToString();
                        //temp.Security = reader["Security"].ToString();
                        temp.Status = (int)reader["Status"];
                        list.Add(temp);
                    }
                    reader.Close();
                }
                command.Dispose();
                return list;
            }
        }
        catch (Exception exp)
        { return null; }
        finally { connection.Close(); }
    }
}

و این هم کد کلاس Nodes

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
 
namespace Common_Layer
{
    [Serializable]
    public class Node : IDisposable
    {
        #region Define Variables
        Guid _IDNode;
        string _NodeName;
        string _NodeCaption;
        string _NavigateUrl;
        Guid _ParentNodeID;
        int _NodeDepth;
        string _NodeLineage;
        string _tni;
        string _UserTypeid;
        int _Status;
        int _Periority;
 
 
        #endregion
 
        #region Define Constractors
        public Node()
        {
        }
        public Node(Node Node)
        {
            _IDNode = Node.IDNode;
            _NodeName = Node.NodeName;
            _NodeCaption = Node.NodeCaption;
            _NavigateUrl = Node.NavigateUrl;
            _ParentNodeID = Node.ParentNodeID;
            _NodeDepth = Node.NodeDepth;
            _NodeLineage = Node.NodeLineage;
            _tni = Node.Tni;
            _UserTypeid = Node.UserTypeID;
            _Status = Node.Status;
            _Periority = Node.Periority;
             
        }
        #endregion
 
        #region Define Properties
        public Guid IDNode
        {
            set { _IDNode = value; }
            get { return _IDNode; }
        }
        public string NodeName
        {
            set { _NodeName = value; }
            get { return _NodeName; }
        }
        public string NodeCaption
        {
            set { _NodeCaption = value; }
            get { return _NodeCaption; }
        }
        public string NavigateUrl
        {
            set { _NavigateUrl = value; }
            get { return _NavigateUrl; }
        }
        public Guid ParentNodeID
        {
            set { _ParentNodeID = value; }
            get { return _ParentNodeID; }
        }
        public int NodeDepth
        {
            set { _NodeDepth = value; }
            get { return _NodeDepth; }
        }
        public string NodeLineage
        {
            set { _NodeLineage = value; }
            get { return _NodeLineage; }
        }
        public string Tni
        {
            set { _tni = value; }
            get { return _tni; }
        }
        public string UserTypeID
        {
            set { _UserTypeid = value; }
            get { return _UserTypeid; }
        }
        public int Status
        {
            set { _Status = value; }
            get { return _Status; }
        }
        public int Periority
        {
            set { _Periority = value; }
            get { return _Periority; }
        }
 
         
        #endregion
         
 
        #region IDisposable Members
 
        public void Dispose()
        {
            GC.SuppressFinalize(this);
        }
 
        #endregion
    }
    [Serializable()]
<b>    public class ListNodes : List<Node></b><font color="#ff0000"><b>
    { }</b></font>
}

private ListNodes AllNodes;
AllNodes = getNode("{48401D4A-2F90-469E-849B-FBFD6F044AA1}", 0);