How to read, write, append in text file using C#

How to read, write, append in text file using C#:

Working steps to show how to read, write, append in text file using C#:

1. Taken a new form, design it with heading Label, 3 button – changed some font and color properties to look better.
2. At first I have declared a variable named thepath to define a specific path location where I want to create text file and read, write, append content
3. To write content in text file I have used WriteAllText method before doing that I have checked is any file exist in this location by this name , if not then it take the content from the string variable and create the text file.
4. Here I have shown a message to show that file create.
5. To add more content in text file I have used AppendAllText method that takes content from the string variable and append or add text to the text file.
6. To read content from text file I have used ReadAllText method that retrieve content from the text file all at once and I have showed it by a message.
7. We can read content from text file line by line using another method called ReadAllLines and set it to a string type array and then retrieve all lines using a for each loop. Here I have passed the variable to message that showed the content line by line.
8. Run and check

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