I offer 2 Write methods in my class, one that writes to and returns a
MemoryStream, and one that writes to a file.  The 2nd one just calls the 1st
one, then I want to write the returned ms to disk.  I tried 2 different
approaches, with the problems indicated:

(1)
        using (FileStream fs = File.OpenWrite(fileName))
        {
           fs.Write(ms.GetBuffer(), 0, (int)ms.Position);
        }

==> This approach wouldn't write out the final block of  text (about 500
bytes), even though I did a Flush on the ms.

(2)
        byte[] array = ms.ToArray();
        using (MemoryStream ms2 = new MemoryStream(array))
        {
           using (FileStream fs = File.OpenWrite(fileName))
           {
              fs.Write(array, 0, ms2.Length);
           }
        }
==> This approach would write out an extra 200K of garbage text!

So I had to resort to this uglier brute-force method which at least works:

        byte[] array = ms.ToArray();
        using (MemoryStream ms2 = new MemoryStream(array))
        {
           using (StreamReader sr = new StreamReader(ms2))
           {
              using (StreamWriter sw = new StreamWriter(fileName, false))
              {
                 string line;
                 while ( (line=sr.ReadLine()) != null)
                    sw.WriteLine(line);
              }
           }
        }

Any ideas why one of the first more compact approaches would not be reliable?