public void ReadElement(DynamicEntity doc)
{
sbyte typeNum = (sbyte)reader.ReadByte();
position++;
String key = ReadString();
if (key == "$id")
doc.Id = ReadElementType(typeNum) as string;
else if (key == "$ref")
{
doc.Type = ReadElementType(typeNum) as string;
}
else
doc.Add(key, ReadElementType(typeNum));
}
