I agree with nakchak, if you are using a Netduino Plus it will not support the DPWS features provided by NETMF (memory size issue).
REST solution using HttpRequest or even using only sockets is a very efficient option on Netduino.
I recommend having a look at Chapter 2 of Getting Started with the Internet of Things
the sample code from the book is a really good start.
In fact I will not use the netduino, I'll use the Tahoe 2, below is the feature of this board:
Será que com essa especificação daria pra utilizar o DPWS.
I am from Brazil...