Program to calculate the File size in specified folder using LINQ

 static void Main(string[] args)
 {
  string[] dirfiles = Directory.GetFiles("c:\\myFoldername\\");            
  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();
 }