控件數組 循環賦值

CheckBox[] ches = new CheckBox[16];
         static  int  therest;

         private void step()
         {
             for (int i = 1; i <= 15; i++) //控件數組賦值
             {
                 ches[i] = (CheckBox)(this.Controls["checkBox" + i.ToString()]);
                 if (ches[i].Checked == false)
                 {
                     ches[i].Enabled = true;
                 }
                 ches[i].Click += new EventHandler(ches_Click);
             }

         }