c read and write to a text file

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console app example of reading and writing to a file. part of the c# intermediate programming course. full playlist is here https://www.youtube.com/watch?v=hvplhk9jqmm&list=plhpyefl5u-i03yjavwpwyyg6s3k0jh8qx

next video: https://www.youtube.com/watch?v=ey7idbdl4pi

contents
0:00 file io introduction and goals for this tutorial
0:45 demo of the test application
1:10 create a new console app
1:35 create a text document
2:20 create a filepath string using the @ symbol for literal strings
3:00 create an array of strings
3:20 using system.io
3:40 readalllines

c read and write to a text file