private void SalesForm_Load(object sender, EventArgs e) { var li = saleController.get_my_sales_list(); var li2 = saleController.get_my_wrong_sales_list(); currentTransctionsList = new SortableBindingList <MDB_Sale>(li); currentWrongTransctionsList = new SortableBindingList <MDB_Sale>(li2); salesDataGridView.DataSource = this.currentTransctionsList; wrongSalesdataGridView.DataSource = this.currentWrongTransctionsList; }