Complete the following C# windows form application program. The form is composed of the following controls: Listbox (listBox1), TextBox (textBox1), Button (button1).

The program should calculate the factors of any NON-PRIME number when the user enters a number in texBox1 and click on button1, then the program should perform the following

If the user tries to click the button without entering a number, the program should display an appropriate error message.

If the user entered a prime number, the program should display an error message Prime Number is Not Allowed.

If the user enters a non-prime number, then clear the listbox.

calculate all the factors of the entered number and display them in listBox1

clear the textbox after the calculation.

Sample Output:

namespace Exam {

public partial class Form1 : Form {

public Form1() { InitializeComponent(); }

// Your answer goes here

}

Form1 Num 12 1 2 3 4 6 6 12 button1