Working With Files in C# – C# Programming Example
C#

Working With Files in C#

Working With Files

The File class from the System.IO namespace, allows us to work with files:

The File class has many useful methods for creating and getting information about files.

For example:

Method Description
AppendText() Appends text at the end of an existing file
Copy() Copies a file
Create() Creates or overwrites a file
Delete() Deletes a file
Exists() Tests whether the file exists
ReadAllText() Reads the contents of a file
Replace() Replaces the contents of a file with the contents of another file
WriteAllText() Creates a new file and writes the contents to it. If the file already exists, it will be overwritten.

 

Write To a File and Read It

In the following example, we use the WriteAllText() method to create a file named “filename.txt” and write some content to it. Then we use the ReadAllText() method to read the contents of the file:

Example:

 

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