Why is the console window closing immediately once displayed my output?

Question

I\'m studying C# by following the guides in MSDN.

Now, I just tried the Example 1 (here is the link to MSDN), and I\'ve encountered an i

Answer 1

if your program requires you to press enter to continue like you have to enter a value and continue, then add a new double or int and type write before retunr(0); scanf_s("%lf",&the variable);