System.Security.Util.Parser.ParseContents C# (CSharp) Method

        private void ParseContents()
        {
            short i;

            TokenizerStream stream = new TokenizerStream();

            _t.GetTokens( stream, 2, false );
            stream.Reset();

            int gotoPosition = DetermineFormat( stream );

            stream.GoToPosition( gotoPosition );
            _t.GetTokens( stream, -1, false );
            stream.Reset();

            int neededIndex = 0;
            
            GetRequiredSizes( stream, ref neededIndex );

            _doc = new SecurityDocument( neededIndex );
            int position = 0;

            stream.Reset();

            for (i = stream.GetNextFullToken(); i != -1; i = stream.GetNextFullToken())
            {
                if ((i & c_flag) != c_flag)
                    continue;
                else
                {
                    switch((short)(i & 0xFF00))
                    {
                    case c_elementtag:
                        _doc.AddToken( SecurityDocument.c_element, ref position );
                        _doc.AddString( stream.GetNextString(), ref position );
                        break;

                    case c_attributetag:
                        _doc.AddToken( SecurityDocument.c_attribute, ref position );
                        _doc.AddString( stream.GetNextString(), ref position );
                        _doc.AddString( stream.GetNextString(), ref position );
                        break;

                    case c_texttag:
                        _doc.AddToken( SecurityDocument.c_text, ref position );
                        _doc.AddString( stream.GetNextString(), ref position );
                        break;

                    case c_additionaltexttag:
                        _doc.AppendString( " ", ref position );
                        _doc.AppendString( stream.GetNextString(), ref position );
                        break;

                    case c_childrentag:
                        _doc.AddToken( SecurityDocument.c_children, ref position );
                        break;

                    case c_wastedstringtag:
                        stream.ThrowAwayNextString();
                        break;

                    default:
                        throw new XmlSyntaxException();
                    }
                }
            }
        }