C# Program to Count File Extensions and Group it using LINQ (JNNC Technologies)

In this article, we will write a C# program to count file extensions and Group it using LINQ

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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;

namespace LinqSamples

{

   public class Program

    {

        public static void Main()

        {

            string[] arr = { "sample.txt", "sample1.TXT", "sample.test.pdf", "sample1.PDF", "sample.xml", "sample2.txt", "sample3.txt" };

            var egrp = arr.Select(file => Path.GetExtension(file).TrimStart('.').ToLower())

                     .GroupBy(x => x, (ext, extCnt) => new

                     {

                         Extension = ext,

                         Count = extCnt.Count()

                     });

            foreach (var v in egrp)

                Console.WriteLine("{0} File(s) with {1} Extension ", v.Count, v.Extension);

            Console.ReadLine();

        }

    }

}