code:

using (var streamReader = new StreamReader(inputFilePath, Encoding.ASCII))
{
      using (var streamWriter = new StreamWriter(outputFilePath,false))
      {
           char[] bytes = new char[100];
           while (streamReader.Read(bytes, 0, 100) > 0)
           {
                 var data = new string(bytes);
                 streamWriter.WriteLine(data);
           }
           MessageBox.Show("Compleated");
       }
}