Write Text to a File

using System;
using System.IO;
using System.Text;
using System.Collections.Generic;

class Program
{

    static void Main(string[] args)
    {

        string mydocpath = 
         Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
        StringBuilder sb = new StringBuilder();

        foreach (string txtName in Directory.EnumerateFiles(mydocpath,"*.txt"))
        {
            using (StreamReader sr = new StreamReader(txtName))
            {
                sb.AppendLine(txtName.ToString());
                sb.AppendLine("= = = = = =");
                sb.Append(sr.ReadToEnd());
                sb.AppendLine();
                sb.AppendLine();
            }

        }

        using (StreamWriter outfile = 
         new StreamWriter(mydocpath + @"\AllTxtFiles.txt"))
        {
            outfile.Write(sb.ToString());
        }
    }
} 

C++

using namespace System;
using namespace System::IO;
using namespace System::Text;
using namespace System::Collections::Generic;

ref class Program
{
public:
    static void Main()
    {
        String^ mydocpath =
         Environment::GetFolderPath(Environment::SpecialFolder::MyDocuments);
        StringBuilder^ sb = gcnew StringBuilder();

        for each (String^ txtName in Directory::EnumerateFiles(mydocpath, "*.txt"))
        {
            StreamReader^ sr = gcnew StreamReader(txtName);
            sb->AppendLine(txtName->ToString());
            sb->AppendLine("= = = = = =");
            sb->Append(sr->ReadToEnd());
            sb->AppendLine();
            sb->AppendLine();
            sr->Close();
        }

        StreamWriter^ outfile = gcnew StreamWriter(mydocpath + "\\AllTxtFiles.txt");
        outfile->Write(sb->ToString());
        outfile->Close();
    }
};

int main()
{
    Program::Main();
}