Difference between two lists in String Value

 

You need using Except twice:

var list1 = new List<int> { 1, 2, 3, 4, 5};
var list2 = new List<int> { 3, 4, 5, 6, 7 };

var list3 = list1.Except(list2); //list3 contains only 1, 2
var list4 = list2.Except(list1); //list4 contains only 6, 7
var resultList = list3.Concat(list4).ToList(); //resultList contains 1, 2, 6, 7

For Example Given Below :- 

 string PId = "26949323-DB72-4E87-A1EB-2BB4350BD021";
            Guid PrtyId;
            Guid.TryParse(PId, out PrtyId);
            List<BO.BuyerItemDispatch> SaleList = BuyerItemDispatchManager.GetAll().Where(t => t.SId == PrtyId && t.ItemNo == "D-D5-20").ToList();
            if (SaleList.Count > 0)
            {
                string[] salevalue = SaleList[0].Extra1.Split(','); // sale value
                List<string> saleValues = salevalue.ToList();
                List<BO.PartyBooking> getReturnParty = PartyBookingManager.GetAll().Where(t => t.Extra1 == PrtyId.ToString()).ToList();
                if (getReturnParty.Count > 0)
                {
                    List<BO.PartyReturn> SaleReturnList = PartyReturnManager.GetAll().Where(t => t.SId == getReturnParty[0].Id && t.ItemNo == "D-D5-20").ToList();
                    if (SaleReturnList.Count > 0)
                    {
                        foreach (var item in SaleReturnList)
                        {
                            #region Range Collect Start no between end no
                            int sn = 0;
                            int en = 0;
                            int.TryParse(item.Size, out sn);
                            int.TryParse(item.NetQty, out en);

                            for (int i = sn; i <= en; i++)
                            {
                                ReturnValue += i + ",";
                            }
                             returnsalevalue = ReturnValue.Split(','); // return value 
                           
                            #endregion
                           
                        }
                        List<string> returnValues = returnsalevalue.ToList();
                        List<string> finalResult = saleValues.Except(returnValues).ToList(); // Total Sale Value (Unsold)
                        foreach (string s in finalResult)
                        {
                            lblReturnvalue.Text += s + ", <b/>";
                        }
                       
                    }

                }

            }

List<int> list1 = new List<int>();
        List<int> list2 = new List<int>();
        List<int> listDifference = new List<int>();

        foreach (var item1 in list1)
        {
            foreach (var item2 in list2)
            {
                if (item1 != item2)
                    listDifference.Add(item1);
            }
        }