New Post: Collections and its element satisfying a condition

How to assert that a collection has exactly one item of a specified type? At the moment what I can do is:

items.Should().HaveCount(1);
items[0].Should().BeOfType<MyType>();

There come some questions:

1. Is it possible to do the same with a one-liner? I'm aware of the HaveElementAt() method, but it requires an object instance to compare with. I can imagine a one-argument overload of:
   

   object HaveElementAt(int index)
   

   which would return element at that index and expose it to further assertions, like this:
   

   items.Should().HaveCount(1).And.HaveElementAt(0).OfType<MyType>();
   

   
   
   
2. In general, is it technically correct for FA to put multiple assertions in one test method?