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();         }     } }

Try it online in dotnetfiddle.

Output:

4 file(s) with txt Extension
2 file(s) with pdf Extension
1 File(s) with xml Extension