C#

bool loadAssembly
  (string strDllFilename)
{
  try  {
    Assembly.LoadAssembly (strDllFilename);
  } catch (Exception) {
    return (false);
  }
  return (true);
}

using System.Text;
using System.IO;

...

public static void Convert(string infile, string outfile)
{
    //If the file does not exist, throw an exception.
    if (!File.Exists(infile)) throw new FileNotFoundException();
    
    //Open the file with a FileStream object
    FileStream fs = new FileStream(infile, FileMode.Open);

    //Create a byte[] the same size as the file
    byte[] bytes = new byte[fs.Length];

    //Read the bytes from the FileStream object into the byte array
    fs.Read(bytes, 0, fs.Length);

    //Close and get rid of the FileStream
    fs.Close();
    fs.Dispose();

    //Convert the byte[] to a string
    string str = Encoding.ASCII.GetString(bytes);

    //Write the string to a file
    TextWriter t = new StreamWriter(outfile);
    t.Write(str);
    t.Flush();
    t.Close();
    t.Dispose();
}