private void ComputerServcing_Load(object sender, EventArgs e) { GeneralOperations go = new GeneralOperations(); GeneralOperations go2 = new GeneralOperations(); List <AccessPropertySP> getComputerServices = go.GetAllComputerServices(); //go2.GetServiceProviderAdditionalDetails(userName) DataTable dt = new DataTable(); dt.Columns.Add("Name"); dt.Columns.Add("Profession"); dt.Columns.Add("City"); dt.Columns.Add("Address"); foreach (var item in getComputerServices) { var row = dt.NewRow(); row["Name"] = item.UserName; row["Profession"] = item.Profession; row["City"] = item.City; row["Address"] = item.Address; dt.Rows.Add(row); } computerservicingdataGridView.DataSource = dt; }