Get the number of bytes in a file in C#

FileInfo type has a Length property that determines how many bytes a file has.

Firstly, set the file −

FileInfo file = new FileInfo("D:\\new");

Now use the Length property −

file.Length

Here is the complete code −

Example

using System;
using System.Linq;
using System.IO;
class Program {
   static void Main() {
      FileInfo file = new FileInfo("D:\\new");
      long res = file.Length;
      Console.WriteLine("Bytes: "+res);
   }
}

Output

The following is the output −

3259244