A common mistake with loops is to create an endless loop. In the example a line to subtract 1 from i is missing and the loop will never end.
private void Form1_Load(object sender, EventArgs e) { // Add 10,9,8,7,6,5,4,3,2,1,Blast OFF! to a list box. int i = 10; do { listBox1.Items.Add(i); } while (i > 0); listBox1.Items.Add("Blast off"); }
Depending on what else the loop is doing, the system may eventually give you an error message, or you will realize the program is “frozen” or “hung-up.” If you are working in Visual Studio, you can select Debug,Stop Debugging from the menu to end the program.
