System.StackOverflowException

Question

Plz help me.............
I am getting an error

An unhandled exception of type 'System.StackOverflowException' occurred in ShizheDLL.dll

in the page

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using SHIZHE;
//using SHIZHEBL;
namespace ShizheDLL
{
    public class ItemMasterDL
    {
    
    #region Declaration
        ItemMasterDL objItemMasterDL = new ItemMasterDL();
        int iItemId = 0;
        int mode = 0;
        string vProductCode = string.Empty;
        string vPrductName = string.Empty;
        string vUnit = string.Empty;
        double fTaxPercentage = 0;
        double dDealerPrice = 0;
        double dMRP = 0;
        int iScheduleEntryNo = 0;
        string vHSNcode = string.Empty;
        int iPointValue = 0;
        int iBusinessVolume = 0;
        string vSticker = string.Empty;

    #endregion

    #region Property

        public int ItemId
        {
            get
            {
                return iItemId;
            }
            set
            {
                iItemId = value;
            }
        }

        public int Mode
        {
            get
            {
                return mode ;
            }
            set
            {
                mode  = value;
            }
        }

        public string ProductCode
        {
            get
            {
                return vProductCode;
            }
            set
            {
                vProductCode = value;
            }
        }

        public string PrductName
        {
            get
            {
                return vPrductName;
            }
            set
            {
                vPrductName = value;
            }
        }

        public string Unit
        {
            get
            {
                return vUnit;
            }
            set
            {
                vUnit = value;
            }
        }

        public double TaxPercentage
        {
            get
            {
                return fTaxPercentage;
            }
            set
            {
                fTaxPercentage = value;
            }
        }

        public double DealerPrice
        {
            get
            {
                return dDealerPrice;
            }
            set
            {
                dDealerPrice = value;
            }
        }

        public double MRP
        {
            get
            {
                return dMRP;
            }
            set
            {
                dMRP = value;
            }
        }

        public int ScheduleEntryNo
        {
            get
            {
                return iScheduleEntryNo;
            }
            set
            {
                iScheduleEntryNo = value;
            }
        }

        public string HSNcode
        {
            get
            {
                return vHSNcode;
            }
            set
            {
                vHSNcode = value;
            }
        }

        public int PointValue
        {
            get
            {
                return iPointValue;
            }
            set
            {
                iPointValue = value;
            }
        }

        public int BusinessVolume
        {
            get
            {
                return iBusinessVolume;
            }
            set
            {
                iBusinessVolume = value;
            }
        }

        public string Sticker
        {
            get
            {
                return vSticker;
            }
            set
            {
                vSticker = value;
            }
        }

    #endregion

    #region Methodes

        public int InsertUpdateItemMaster()
        {
            Connection con = new Connection();

            SqlParameter[] parmItemMaster = new SqlParameter[13];

            parmItemMaster[0] = new SqlParameter();
            parmItemMaster[0].SqlDbType = SqlDbType.Int;
            parmItemMaster[0].ParameterName = "@iItemId";
            parmItemMaster[0].Value = ItemId;

            parmItemMaster[1] = new SqlParameter();
            parmItemMaster[1].SqlDbType =SqlDbType .VarChar ;
            parmItemMaster[1].ParameterName ="@vProductCode";
            parmItemMaster[1].Value =ProductCode;

            parmItemMaster[2] = new SqlParameter();
            parmItemMaster[2].SqlDbType =SqlDbType .VarChar ;
            parmItemMaster[2].ParameterName ="@vPrductName";
            parmItemMaster[2].Value =PrductName;

            parmItemMaster[3] = new SqlParameter();
            parmItemMaster[3].SqlDbType =SqlDbType .VarChar ;
            parmItemMaster[3].ParameterName ="@vUnit";
            parmItemMaster[3].Value =Unit;

            parmItemMaster[4] = new SqlParameter();
            parmItemMaster[4].SqlDbType =SqlDbType.Float ;
            parmItemMaster[4].ParameterName ="@fTaxPercentage";
            parmItemMaster[4].Value =TaxPercentage;

            parmItemMaster[5] = new SqlParameter();
            parmItemMaster[5].SqlDbType =SqlDbType.Decimal ;
            parmItemMaster[5].ParameterName ="@dDealerPrice";
            parmItemMaster[5].Value =DealerPrice;

            parmItemMaster[6] = new SqlParameter();
            parmItemMaster[6].SqlDbType =SqlDbType.Decimal ;
            parmItemMaster[6].ParameterName ="@dMRP";
            parmItemMaster[6].Value =MRP;


            parmItemMaster[7] = new SqlParameter();
            parmItemMaster[7].SqlDbType =SqlDbType .Int  ;
            parmItemMaster[7].ParameterName ="@iScheduleEntryNo";
            parmItemMaster[7].Value =ScheduleEntryNo;

            parmItemMaster[8] = new SqlParameter();
            parmItemMaster[8].SqlDbType =SqlDbType .VarChar ;
            parmItemMaster[8].ParameterName ="@vHSNcode";
            parmItemMaster[8].Value =HSNcode;

            parmItemMaster[9] = new SqlParameter();
            parmItemMaster[9].SqlDbType =SqlDbType .Int ;
            parmItemMaster[9].ParameterName ="@iPointValue";
            parmItemMaster[9].Value =PointValue;

            parmItemMaster[10] = new SqlParameter();
            parmItemMaster[10].SqlDbType =SqlDbType .Int;
            parmItemMaster[10].ParameterName ="@iBusinessVolume";
            parmItemMaster[10].Value =BusinessVolume;

            parmItemMaster[11] = new SqlParameter();
            parmItemMaster[11].SqlDbType =SqlDbType .VarChar ;
            parmItemMaster[11].ParameterName ="@vSticker";
            parmItemMaster[11].Value =Sticker;

            parmItemMaster[12] = new SqlParameter();
            parmItemMaster[12].SqlDbType = SqlDbType.Int;
            parmItemMaster[12].ParameterName = "@mode";
            parmItemMaster[12].Value = Mode;

            int iStatus = con.insUpdata("sp_InsertUpdateItemMaster", parmItemMaster);

            return iStatus;
        }
     
    #endregion


    }
}