// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002030/directoryinfo-getfilesystementries

​

// @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 - GetFileSystemEntries

        var entries = DirectoryName.ToDirectoryInfo().GetFileSystemEntries(pattern);

​

        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");

    }

}