Introduction/Introduction.sln

@@ -1,25 +0,0 @@
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-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{53450129-90CC-4C40-BDB3-295F60669012}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{53450129-90CC-4C40-BDB3-295F60669012}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{53450129-90CC-4C40-BDB3-295F60669012}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{53450129-90CC-4C40-BDB3-295F60669012}.Release|Any CPU.Build.0 = Release|Any CPU
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-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
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-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {3A6B85BA-05FF-44DA-B35D-12FDDCF35AC7}
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Introduction/Introduction/Introduction.csproj

@@ -1,8 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
-  </PropertyGroup>
-
-</Project>

Introduction/Introduction/Program.cs

@@ -1,52 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-
-namespace Introduction
-{
-    class Program
-    {
-        static void Main(string[] args)
-        {
-            string path = Directory.GetCurrentDirectory();
-            ShowLargeFilesWithoutLinq(path);
-
-            Console.WriteLine("***");
-            ShowLargeFilesWithLinq(path);
-        }
-
-        private static void ShowLargeFilesWithLinq(string path)
-        {
-            var query = new DirectoryInfo(path).GetFiles()
-                        .OrderBy(f => f.Length)
-                        .Take(5);
-            foreach (var file in query.Take(5))
-            {
-                Console.WriteLine($"{file.Name,-50} : {file.Length,10:N0}");
-            }
-        }
-
-        private static void ShowLargeFilesWithoutLinq(string path)
-        {
-            DirectoryInfo directory = new DirectoryInfo(path);
-            FileInfo[] files = directory.GetFiles();
-            Array.Sort(files, new FileInfoComparer());
-
-            for (int i = 0; i < 5; i++)
-            {
-                FileInfo file = files[i];
-                Console.WriteLine($"{file.Name, -20} : {file.Length, 10:N0}");
-            }
-        }
-        
-    }
-
-    public class FileInfoComparer : IComparer<FileInfo>
-    {
-        public int Compare(FileInfo x, FileInfo y)
-        {
-            return y.Length.CompareTo(x.Length);
-        }
-    }
-}