// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002038/directoryinfo-getsize

​

// @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 - GetSize

        var size = DirectoryName.ToDirectoryInfo().GetSize();

        Console.WriteLine("Directory Size: {0}", size);

    }

    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");

        string file1 = DirectoryName + "\\EntityFramework.txt";

        string file2 = DirectoryName + "\\oldTest.txt";

        file1.ToFileInfo().WriteAllText("EF text");

        file2.ToFileInfo().WriteAllText("text");

    }

}