How do I work with files and directories in C#?

.Net Training: Working with Files and Directories in C#

Introduction As a seasoned tutor specializing in .Net Training, I understand the significance of mastering file and directory operations in C#. This skill is fundamental for any .Net developer, and it forms an integral part of our training program.

I. Understanding File and Directory Operations in C#

A. Overview

• Files and directories are crucial components in software development.
• C# provides robust libraries for efficient file and directory handling.

B. System.IO Namespace

• The primary namespace for file and directory operations is System.IO.
• Import the namespace in your C# code: using System.IO;.

II. Working with Files in C#

A. Creating a File

• Use File.Create() to create a new file.
• Example:
  csharp

• string filePath = "C:\\MyFiles\\example.txt"; File.Create(filePath).Close();

B. Writing to a File

• Use File.WriteAllText() or File.AppendAllText() to write content to a file.
• Example:
  csharp

• string content = "Hello, C#!"; File.WriteAllText(filePath, content);

C. Reading from a File

• Use File.ReadAllText() to read the entire content of a file.
• Example:
  csharp

• string fileContent = File.ReadAllText(filePath);

D. Deleting a File

• Use File.Delete() to remove a file.
• Example:
  csharp

• File.Delete(filePath);

III. Working with Directories in C#

A. Creating a Directory

• Use Directory.CreateDirectory() to create a new directory.
• Example:
  csharp

• string directoryPath = "C:\\MyFiles\\NewDirectory"; Directory.CreateDirectory(directoryPath);

B. Listing Files in a Directory

• Use Directory.GetFiles() to retrieve a list of files in a directory.
• Example:
  csharp

• string[] files = Directory.GetFiles(directoryPath);

C. Listing Subdirectories

• Use Directory.GetDirectories() to get a list of subdirectories.
• Example:
  csharp

• string[] subDirectories = Directory.GetDirectories(directoryPath);

D. Deleting a Directory

• Use Directory.Delete() to delete a directory.
• Example:
  csharp