&gt;  wrap it in a commercial product and resell it.<p>The PATENTS.txt file seems to suggest otherwise, you must stay within the bounds of &quot;covered code&quot;. IANAL so I do not know what the side effects of this seemingly intersection of their patent&#x2F;license coverage curtails, but it does seem like you lose protection and could have a Android&#x2F;Oracle situation if you innovate something on top of the core CLR outside of the &#x27;covered&#x27; bounds and then decided to sell it.<p>There&#x27;s a slightly older writeup about it here <a href="http:&#x2F;&#x2F;endsoftpatents.org&#x2F;2014&#x2F;11&#x2F;ms-net&#x2F;" rel="nofollow">http:&#x2F;&#x2F;endsoftpatents.org&#x2F;2014&#x2F;11&#x2F;ms-net&#x2F;</a><p>In any case, as the name suggests, it&#x27;s only a promise, not a guarantee of rights.