title: Mock a Guid with Moq
body: <p>I'm using Moq for unit testing. I want to mock a <code>Guid</code>. I found <a href="https://stackoverflow.com/questions/11589320/mocking-guid-newguid">this post about mocking <code>Guid.NewGuid()</code></a>, but I don't know if it will work for me because I don't know (and can't find) what type <code>mockGuidService</code> is. </p>