C# FileStream

In the C#, FileStream provides a Stream for a file,supporting both synchronous and asynchronous read and write operations.

By the help of FileStream class, you can easily read and write data into file.

C# FileStream example: writing single byte into file

Let's see the simple example of FileStream class to write single byte of data into file. 

using System; 
using System.IO; 
namespace FindAndSolve  
{  
    public class Program  
    {  
        public static void Main(string[] args)   
        {               
           FileStream file = new FileStream("d:\\FileStreamExample.txt", FileMode.OpenOrCreate);//creating file stream  
           file.WriteByte(65);//writing byte into stream  
           file.Close();//closing stream  
        }  
    }  
}

Output

A

C# FileStream example: writing multiple bytes into file

using System; 
using System.IO;
namespace FindAndSolve  
{  

    public class Program  
    {  
        public static void Main(string[] args)   
        {             
        FileStream file = new FileStream("d:\\FileStreamExample.txt", FileMode.OpenOrCreate);  
        for (int i = 65; i <= 90; i++)  
        {  
            file.WriteByte((byte)i);  
        }  
        file.Close();  
        }  
    }  
}

Output

ABCDEFGHIJKLMNOPQRSTUVWXYZ

C# FileStream example: reading all bytes from file

using System; 
using System.IO; 
namespace FindAndSolve 
{  
    public class Program  
    {  
        public static void Main(string[] args)   
        {             
        FileStream file = new FileStream("d:\\FileStreamExample.txt", FileMode.OpenOrCreate);  
        int i = 0;  
        while ((i = file.ReadByte()) != -1)  
        {  
            Console.Write((char)i);  
        }  
        file.Close();  
    }  
  }
}

Output

ABCDEFGHIJKLMNOPQRSTUVWXYZ