// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002026/directoryinfo-getdirectories

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.IO;

​

public class Program

{

    public static string DirectoryName = "Main Directory";

    public static void Main()

    {

        CreateFilesAndDirectories();

        string [] pattern = {"*Framework", "Java"};

        //C# Extension Method - DirectoryInfo - GetDirectories

        var directories = DirectoryName.ToDirectoryInfo().GetDirectories(pattern);

​

        foreach (var dir in directories)

        {

             Console.WriteLine(dir.Name);

        }

    }

    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 + "\\newTest.md");

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

    }

}