L" How to read from file cyrillic text ( C++ / C# )"

#pragma once
#include <iostream>
#include <string>
#include  <vcclr.h>
#include <locale>
 
//.................................................................................................................................
    using namespace System;
    using namespace System::IO;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;
    using namespace System::Text;
    using namespace std;
 
    
    using std::wstring;
//....................................................................................................................................
 
//some button click:
    {
 
      Stream^ myStream;
      OpenFileDialog^ openFileDialog1 = gcnew OpenFileDialog;
 
      openFileDialog1->InitialDirectory = "d:\\";
      openFileDialog1->Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
      openFileDialog1->FilterIndex = 1;
      openFileDialog1->RestoreDirectory = true;
 
     if ( openFileDialog1->ShowDialog() == System::Windows::Forms::DialogResult::OK )
      {
    Stream^ fstream = openFileDialog1->OpenFile();
    StreamReader^ freader = gcnew StreamReader(fstream);
    String^ text = freader->ReadToEnd();
    TextBox^ textbox = gcnew TextBox();
    textbox->Text = text;
    textBox1->Text = text;
    // myStream->Close();
      }
   }