system.data.datatable

I have the following scenario: Table A that has 50 records and Table B that has 2 records. I need to define a new table, say TableDiff which should contain 48 records from Table A that doesn't exist in Table B My problem is that Table A and Table B are not identical but I have the field rowId which exists in both tables that I need to compare using it. One way using Enumerable.Except and Enumerable.Join : var aIDs = TableA.AsEnumerable().Select(r => r.Field<int>("RowID")); var bIDs = TableB.AsEnumerable().Select(r => r.Field<int>("RowID")); var diff = aIDs.Except(bIDs); DataTable tblDiff =

I have researching through very simple code and get stuck on seeing the dispose() result of datatable Following is the code DataTable dt= new Datatable(); SqlCommand Cmd = new SqlCommand("sp_getData",SqlCon); SqlCommand.CommandType= CommandType.StroedProcedure; SqlCon.Open(); sqlDataReader dr= cmd.ExecuteReader(); dt.Load(dr); SqlCon.Close(); grdView.DataSource =dt; dt.Dispose() // Here I dispose the table as it is no use for me & wanna memory free from this But after disposing off the datatable i still found that it is still showing RowCount = 10k. Does Dispose() method does not free up the