1. File System Intro

Question 1

What should you check to see before creating a new directory via code?

Answer 1

Whether or not it exists already.

Question 2

How do you check whether a directory exists?

Answer 2

By passing its path to the Exists static method of the Directory class.

eg. Directory.Exists(“/some/path”);

Question 3

How do you create a folder in C#?

Answer 3

By using the static CreateDirectory method of the Directory class and passing it the path to of the directory to be created.

eg. Directory.CreateDirectory(“/some/path”);

Question 4

How do you delete a folder in C#

Answer 4

By using the static Delete method of the Directory class and passing it the path of the directory to be deleted.

eg. Directory.Delete(“/some/path”);

Question 5

What happens if you try to delete a folder that has folders or files in it?

Answer 5

You get a System.IO.IOException saying “Directory not empty”.

Question 6

What’s the optional second argument of the Directory.Delete method and what does it determine?

Answer 6

A boolean value named recursive that determines whether the contents of the folder should also be deleted if there is any.

Question 7

How do you delete a folder and all its contents if there are any in C#?

Answer 7

By using the Directory.Delete method and passing the folder path and true respectively as arguments.

Question 8

How do you move a folder and all its contents into a new folder?

Answer 8

By using the Directory.Move method and passing the existing directory path and the new path respectively as arguments.