The factorial of a non negative integer n is written n! and is defined as follows: n! = n (n 1) (n 2) 1 (for values of n greater than 1) and n! = 1 (for n = 0 or n = 1).

For example, 5! = 5 4 3 2 1, which is 120. Use while statements in each of the following:

Write a C# Windows Forms Application that reads n from a textbox and display 1! through n! in a list box. Also, estimates the value of the mathematical constant e by using the following formula (with accuracy of 6 decimal places) :

e = 1 + 1/1! + 1/2! + 1/3! + ...