convert binary encoded file to xml c#

I am creating a parser for plist files. There are two types of plist files that i need to parse. The first plist file is a standard xml file which I have working. The second is in binary format and I keep getting an error when trying to convert and load the data to xml. this is the error i am getting..

 Exception: Data at the root level is invalid. Line 1, position 1.

Here is my code, I have tried different methods for converting the binary data to xml and I keep getting the same error.

File info..

The plist file that is in binary format UTF8. If i edit in a plist editor i get the correct format. e.g.

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://ift.tt/vvUEPL">

<dict>
<key>BuildMachineOSBuild</key>
<string>13C64</string>
</dict>
</plist>

    private static Dictionary<string, string> ReadBinary(Stream stream)
    {
        byte[] binary = StreamToBinary(stream);
        XDocument bDocument = BytesToXml(binary);
        List<XElement> elementsFromBinary = XmlToList(bDocument);
        return ListToDictionary(elementsFromBinary);
    }

       private static byte[] StreamToBinary(Stream stream)
    {
        using (var memoryStream = new MemoryStream())
        {
            stream.CopyTo(memoryStream);
            return memoryStream.ToArray();
        }

    }

       private static XDocument BytesToXml(byte[] bytes)
    {
        XDocument xmlDoc;
        xmlDoc = XDocument.Parse(System.Text.Encoding.UTF8.GetString(bytes));  <-- throws exception
        return xmlDoc;

    }