private void show() { pnltask.Controls.Clear(); pnltaskcomplete.Controls.Clear(); // CornerRadius Control ElipseControl nn = new ElipseControl(); nn.TargetControl = lblHeader; nn.CornerRadius = 30; nn.TargetControl = button1; nn.CornerRadius = 30; nn.TargetControl = btnInsert; nn.CornerRadius = 30; //Add task int basex = pnltask.Location.X; List <DAO.Mission> list = new List <DAO.Mission>(); MissionBUS todolistBUS = new MissionBUS(); list = todolistBUS.ReturnMission(ID); List <Task> tasks = new List <Task>(); for (int i = 0; i < list.Count; i++) { //Set Name task string x = list[i].IDMission + ""; Task b = new Task(list[i].NameMission, list[i].Check); b.Name = String.Format(x); //Event check box changed b.checkBox.CheckStateChanged += CheckBox_CheckStateChanged; //Event Delete Task b.bntDelete.Click += BntDelete_Click; //Event Edit Task b.btnEdit.Click += btnEdit_Click; tasks.Add(b); // pnltask.Controls.Add(b); } Checking(tasks); Display(); }