File paths and Directory operations in C Sharp (C#)

Introduction

File paths and directory operations help you find, create, and manage folders and files on your computer.

When you want to save a file in a specific folder.

When you need to check if a folder or file exists before using it.

When you want to create a new folder to organize files.

When you want to list all files inside a folder.

When you want to delete or move files and folders.

Syntax

C Sharp (C#)

using System.IO;

// Get full path
string fullPath = Path.GetFullPath(relativePath);

// Check if directory exists
bool exists = Directory.Exists(path);

// Create directory
Directory.CreateDirectory(path);

// List files in directory
string[] files = Directory.GetFiles(path);

// Delete directory
Directory.Delete(path, recursive: true);

Use Path class to work with file and folder paths safely.

Use Directory class to create, check, list, and delete folders.

Examples

This checks if the folder C:\Users\Public exists and prints true or false.

C Sharp (C#)

string path = "C:\\Users\\Public";
bool exists = Directory.Exists(path);
Console.WriteLine(exists);

This creates a new folder called MyFolder inside C:\Temp.

C Sharp (C#)

string newFolder = "C:\\Temp\\MyFolder";
Directory.CreateDirectory(newFolder);
Console.WriteLine("Folder created");

This lists all files inside the C:\Temp folder.

C Sharp (C#)

string[] files = Directory.GetFiles("C:\\Temp");
foreach (string file in files)
{
    Console.WriteLine(file);
}

This deletes the folder MyFolder and all its contents.

C Sharp (C#)

Directory.Delete("C:\\Temp\\MyFolder", recursive: true);
Console.WriteLine("Folder deleted");

Sample Program

This program checks if a folder named TestFolder exists. If not, it creates it. Then it creates a text file inside that folder and writes a message. Finally, it lists all files in the folder.

C Sharp (C#)

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string folderPath = "TestFolder";

        // Check if folder exists
        if (!Directory.Exists(folderPath))
        {
            Directory.CreateDirectory(folderPath);
            Console.WriteLine("Folder created: " + folderPath);
        }
        else
        {
            Console.WriteLine("Folder already exists: " + folderPath);
        }

        // Create a file path inside the folder
        string filePath = Path.Combine(folderPath, "example.txt");

        // Write text to the file
        File.WriteAllText(filePath, "Hello, file system!");
        Console.WriteLine("File created with text: " + filePath);

        // List files in the folder
        string[] files = Directory.GetFiles(folderPath);
        Console.WriteLine("Files in folder:");
        foreach (string file in files)
        {
            Console.WriteLine(file);
        }
    }
}

Important Notes

Use Path.Combine to join folder and file names safely without errors.

Deleting a folder with recursive: true removes all files and subfolders inside it.

Always check if a folder or file exists before trying to use it to avoid errors.

Summary

File paths tell your program where files and folders are on your computer.

Use Directory class to create, check, list, and delete folders.

Use Path class to work safely with file and folder paths.