// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002031/directoryinfo-getfilesystementrieswhere

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.IO;

​

public class Program

{

    public static string DirectoryName = "Main Directory";

    public static void Main()

    {

        CreateFilesAndDirectories();

        //C# Extension Method - DirectoryInfo - GetFileSystemEntriesWhere

        var entries = DirectoryName.ToDirectoryInfo().GetFileSystemEntriesWhere(x => x.Contains("Framework"));

​

        foreach (var entry in entries)

        {

             Console.WriteLine(entry);

        }

    }

    private static void CreateFilesAndDirectories()

    {

        DirectoryName.ToDirectoryInfo().Create();

        DirectoryName.ToDirectoryInfo().CreateSubdirectory("Entity Framework");

        DirectoryName.ToDirectoryInfo().CreateSubdirectory(".Net Framework");

        DirectoryName.ToDirectoryInfo().CreateSubdirectory("Java");

        DirectoryName.ToDirectoryInfo().CreateSubdirectory("SQL");

        File.Create(DirectoryName + "\\EntityFramework.md");

        File.Create(DirectoryName + "\\oldTest.txt");

    }

}