Quick Links

• Classes
• Enumerations
• Interfaces
• Examples

Classes

Explore the most commonly used classes.

• File – Static methods for creating, copying, deleting, moving, and opening files.
• FileInfo – Instance methods for file manipulation.
• Directory – Static methods for creating, moving, and enumerating through directories.
• DirectoryInfo – Instance methods for directory manipulation.
• Stream – Abstract base class for byte streams.
• FileStream – Stream for file I/O.
• MemoryStream – Stream that uses memory as its backing store.
• BinaryReader – Reads primitive data types as binary values.
• BinaryWriter – Writes primitive data types in binary.
• StreamReader – Reads characters from a byte stream in a particular encoding.
• StreamWriter – Writes characters to a stream in a particular encoding.
• Path – Provides methods for processing strings that contain file or directory path information.
• FileAttributes – Specifies the attributes of a file or directory.
• FileMode – Specifies how the operating system should open a file.
• FileAccess – Defines constants for read, write, or read/write access to a file.
• FileShare – Defines constants for sharing options for a file.

Enumerations

• SeekOrigin – Defines constants for seeking within a stream.
• BufferedSymbol – Sample enumeration.

Interfaces

• IBinaryReader – Interface for binary reading.
• IBinaryWriter – Interface for binary writing.

Code Examples

// Write text to a file
using System;
using System.IO;

class Example
{
    static void Main()
    {
        string path = @"C:\temp\example.txt";
        File.WriteAllText(path, "Hello, World!");
        Console.WriteLine("File written successfully.");
    }
}

// Read all lines from a file
using System;
using System.IO;

class Example
{
    static void Main()
    {
        string path = @"C:\temp\example.txt";
        if (File.Exists(path))
        {
            string[] lines = File.ReadAllLines(path);
            foreach (var line in lines)
                Console.WriteLine(line);
        }
    }
}