C # file creation, reading and writing

When using the operation stream in c #, you must first Add the following two namespaces

Using System. IO;

Using System. Collections;

I have summarized the following methods for IO operations, which are simple but practical.

Directory Creation

File Creation

File Reading and Writing

File row-by-row reading

Although the above Code is concise, It is very convenient to use it in actual operations. This is just summarized in my work. You can try it, you can use the minimum amount of code to achieve the desired effect.