Ascending-Descending in window application?

Question

hi i m making a window application in which i want to make a program of ascending or descending the numbers.
in console it is quite easy, but in window application it will create a problem.
means what i want is when i enter some numbers in textbox like 23, 5, 7, 987, 4567,....and when i click on button so it will give me a sorted list in another textbox.
can anyone tell me how can i do it in C# window application.
kindly give me code, if possible