Basics of FileStream in C#

// C# program to write and read from 
// a text file using FileStream class
using System;
using System.IO;
using System.Text;
 
namespace FileStreamWriteRead {
 
class GFG {
 
    static void Main(string[] args)
    {
        // Create a FileStream Object
        // to write to a text file
        // The parameters are complete 
        // path of the text file in the 
        // system, in Create mode, the
        // access to this process is 
        // Write and for other 
        // processes is None
        FileStream fWrite = new FileStream(@"M:\Documents\Textfile.txt",
                     FileMode.Create, FileAccess.Write, FileShare.None);
 
        // Store the text in the variable text
        var text = "This is some text written to the textfile "+
                       "named Textfile using FileStream class.";
 
        // Store the text in a byte array with
        // UTF8 encoding (8-bit Unicode 
        // Transformation Format)
        byte[] writeArr = Encoding.UTF8.GetBytes(text);
 
        // Using the Write method write
        // the encoded byte array to
        // the textfile
        fWrite.Write(writeArr, 0, text.Length);
 
        // Close the FileStream object
        fWrite.Close();
 
        // Create a FileStream Object
        // to read from a text file
        // The parameters are complete
        // path of the text file in 
        // the system, in Open mode,
        // the access to this process is
        // Read and for other processes
        // is Read as well
        FileStream fRead = new FileStream(@"M:\Documents\Textfile.txt", 
                       FileMode.Open, FileAccess.Read, FileShare.Read);
 
        // Create a byte array 
        // to read from the 
        // text file
        byte[] readArr = new byte[text.Length];
        int count;
 
        // Using the Read method 
        // read until end of file
        while ((count = fRead.Read(readArr, 0, readArr.Length)) > 0) {
            Console.WriteLine(Encoding.UTF8.GetString(readArr, 0, count));
        }
 
        // Close the FileStream Object
        fRead.Close();
        Console.ReadKey();
    }
}
}