Realizando Upload e download de arquivos

    try
    {
        var provider = new MultipartMemoryStreamProvider();
        await Request.Content.ReadAsMultipartAsync(provider);

        foreach (var file in provider.Contents)
        {
            var buffer = await file.ReadAsStreamAsync();

            List<string[]> arquivoGlobal = new List<string[]>();

            using (var reader = new StreamReader(buffer, Encoding.Default, true))
            {
                string conteudo;

                while ((conteudo = reader.ReadLine()) != null)
                {
                    string[] linhas = conteudo.Split('';'');
                    arquivoGlobal.Add(linhas);
                }
            }


            var qtdColunas = arquivoGlobal.First().Count();
            arquivoGlobal.RemoveAt(0);

            arquivoGlobal = arquivoGlobal.OrderBy(x => x[0]).ThenBy(x => x[2]).ToList();
          }
}catch(Exception ex) {
 string erro = ex.Message;
}

// Specify the directories you want to manipulate.
      string path = @"c:\\\\MyDir";
      string target = @"c:\\\\TestDir";

      try
      {
         // Determine whether the directory exists.
         if (!Directory.Exists(path))
         {
            // Create the directory it does not exist.
            Directory.CreateDirectory(path);
         }
  
         if (Directory.Exists(target))
         {
            // Delete the target to ensure it is not there.
            Directory.Delete(target, true);
         }
  
         // Move the directory.
         Directory.Move(path, target);
  
         // Create a file in the directory.
         File.CreateText(target + @"\\\\myfile.txt");

         // Count the files in the target directory.
         Console.WriteLine("The number of files in  is ",
  
         target, Directory.GetFiles(target).Length);
      }
      catch (Exception e)
      {
         Console.WriteLine("The process failed: ", e.ToString());
      }