MOQ - verify exception was thrown

I working with MOQ framework for my testing. I have a scenario in which I expect a fault exception to be thrown. How can I verify it was thrown?

public void Koko(List<string?> list) 
{ 
   foreach(string? str in list) 
   { 
        if (str != null) someProperty.Foo(str); 
        else throw new FormatException(); 
   } 
}