Services
Technology Web App Development Mobile App Development Windows App Development Database Development UI/UX Development Cloud Development SEO Digital Marketing Guest Posting Content Writing Artificial Intelligence Data Science ERP Development CRM Development CMS Development LMS Development Business Listing Blockchain Technology Startup Promotion AI Tools Integration
Products
Data Converter Cleaner TUC - Unit Converter Import Export Survey Manager Tweet Controller
Developer
Article Blog Forum Interview Beginner News Startup Quiz
Users
Career
Apply Job Internship
Pricing
Login Sign Up Get a Quote

interview

Home Interviews How can you read and write to a file simultaneously using FileStream? – MindStick
Ask Question

1 Answers

ICSM Computer
ICSM Computer 05 May 2025
Report Abuse

To read and write to a file simultaneously using FileStream, you can open the file with:

  • FileAccess.ReadWrite (allows both reading and writing)
  • A suitable FileMode like Open or OpenOrCreate

Example: Read and write to the same file

using System;
using System.IO;
using System.Text;

class Program
{
    static void Main()
    {
        string path = "sample.txt";

        using (FileStream fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite))
        {
            // Write to the file
            byte[] writeData = Encoding.UTF8.GetBytes("Hello, World!");
            fs.Write(writeData, 0, writeData.Length);

            // Move the position back to the beginning before reading
            fs.Seek(0, SeekOrigin.Begin);

            // Read from the file
            byte[] readData = new byte[writeData.Length];
            fs.Read(readData, 0, readData.Length);

            Console.WriteLine("Read content: " + Encoding.UTF8.GetString(readData));
        }
    }
}

Notes:

Use fs.Seek(0, SeekOrigin.Begin) to reposition the stream before reading.

This works for simple scenarios. For concurrent read/write from different threads, you'd need more advanced synchronization.

advertising
Markdown for AI

A clean, structured version of this page for AI assistants and LLMs.

Open .md