LINQ: Calculate Average File Size in C#

Let us see a simple code using LINQ and C# that calculates the average FileSize of the files kept in a folder.

First import the following namespaces:

using System.Linq;
using System.IO;

Then write the following code:

class Program
{
 static void Main(string[] args)
 {
  string[] dirfiles = Directory.GetFiles("c:\\software\\");            
  var avg = dirfiles.Select(file =>  
                  new FileInfo(file).Length).Average();
  avg = Math.Round(avg/1000000, 1);
  Console.WriteLine("The Average file size is {0} MB",
   avg);
  Console.ReadLine();
 }
}

The code shown above uses the Average Extension method to compute the average of a sequence of' numeric values. The values in this case is the length of the files in the folder “c:/software”. The result is rounded off to one decimal place using Math.Round

OUTPUT