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Home Interviews How do you create a new file using FileStream in C#? – MindStick
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1 Answers

ICSM Computer
ICSM Computer 05 May 2025
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To create a new file using FileStream in C#, you can use the FileStream constructor with the appropriate FileMode. Here's a basic example:

Example: Create a new file using FileStream

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string filePath = "example.txt";

        // Create a new file. If the file already exists, it will be overwritten.
        using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
        {
            byte[] content = System.Text.Encoding.UTF8.GetBytes("Hello, FileStream!");
            fs.Write(content, 0, content.Length);
        }

        Console.WriteLine("File created successfully.");
    }
}

Key Parameters:

  1. FileMode.Create: Creates a new file or overwrites the existing one.
  2. FileAccess.Write: Grants write access to the file.
  3. using: Ensures the file stream is properly closed and disposed.
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