Class get_Files in Visual C++

#pragma once
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
using namespace System::IO;

ref class get_Files
{
private:
String^ Directory;
array<String^>^files;
public:
get_Files(String^ my_Directory);
System::Void write_Files(ListBox^ my_Box);
};



#include "StdAfx.h"
#include "get_Files.h"

get_Files::get_Files(String^ my_Directory)
{
Directory=my_Directory;
files=Directory::GetFiles(Directory ,"*.*",System::IO::SearchOption::AllDirectories;

}
System::Void get_Files::write_Files(ListBox^ my_Box)
{
System::Int32 i;
my_Box=gcnew ListBox;

for(i=0;i<files->Length;i++)
my_Box->Items->Add(files[i]);
}