title: NSubstitute: Difference between Substitute.For<> and Substitute.ForPartsOf
body: <p>I'm using NSubstitute. I have to fake a class and cannot dig out the difference of <a href="http://nsubstitute.github.io/help/creating-a-substitute/" rel="noreferrer"><code>Substitute.For&lt;...&gt;()</code></a> and <a href="http://nsubstitute.github.io/help/partial-subs/" rel="noreferrer"><code>Substitute.ForPartsOf&lt;...&gt;</code></a>. I already read the documentation but don`t get the point, where the two behave different.</p>