command line tool of formating codes using VisualStudio

CodeFormat.cs

using EnvDTE; //Add Reference to EnvDTE
using System;
using System.IO;
using System.Linq;

namespace CodeFormatter
{
    class Program
    {
        static void Main(string[] args)
        {
            var searchDirectory = @"C:\Users\****\Desktop"; //Set your folder
            var files = Directory.GetFiles(searchDirectory, "*.cs", SearchOption.AllDirectories).ToList();
            EnvDTE.Solution soln = System.Activator.CreateInstance(
                Type.GetTypeFromProgID("VisualStudio.Solution.14.0")) as EnvDTE.Solution;
            //Set ProgID of your VS
            //Visual Studio 2008 -> 10.0
            //Visual Studio 2010 -> 11.0
            //Visual Studio 2013 -> 12.0
            //Visual Studio 2015 -> 14.0
            files.ForEach(file => {
                FormatFile(file, EnvDTE.Solution soln);
                Console.WriteLine($"format {file}"); //C#6.0
            });
        }

        static void FormatFile(string file, EnvDTE.Solution soln)
        {
            soln.DTE.ItemOperations.OpenFile(file);
            TextSelection selection = soln.DTE.ActiveDocument.Selection as TextSelection;
            selection.SelectAll();
            selection.SmartFormat();
            soln.DTE.ActiveDocument.Save();
        }
    }
}