C# – Convert Word Document to XML and back ASP.Net

You can use Convert.ToHexString starting with .NET 5.
There's also a method for the reverse operation: Convert.FromHexString.

For older versions of .NET you can either use:

public static string ByteArrayToString(byte[] ba)
{
  StringBuilder hex = new StringBuilder(ba.Length * 2);
  foreach (byte b in ba)
    hex.AppendFormat("{0:x2}", b);
  return hex.ToString();
}

or:

public static string ByteArrayToString(byte[] ba)
{
  return BitConverter.ToString(ba).Replace("-","");
}

There are even more variants of doing it, for example here.

The reverse conversion would go like this:

public static byte[] StringToByteArray(String hex)
{
  int NumberChars = hex.Length;
  byte[] bytes = new byte[NumberChars / 2];
  for (int i = 0; i < NumberChars; i += 2)
    bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);
  return bytes;
}

Using Substring is the best option in combination with Convert.ToByte. See this answer for more information. If you need better performance, you must avoid Convert.ToByte before you can drop SubString.

Here is the best way, for me, to add code inside word:

1. Go to Insert tab, Text section, click Object button (it's on the right)
2. Choose OpenDocument Text which will open a new embedded word document
3. Copy and paste your code from Visual Studio / Eclipse inside this embedded word page
4. Save and close

Advantages

The result looks very nice. Here are the advantages of this method:

• The code keeps its original layout and colors
• The code is separated from the rest of the document, as if it was a picture or a chart
• Spelling errors won't be highlighted in the code (this is cool !)

And it takes only few seconds.