C# Questions

I need some help with some C# questions. I am new to C# and don't know much. Can you guys help?

01. If a method does not return a value its return type is?

>>18
Hey, that's my annoy line!

But yeah, we have chosen the colour black as a syntactic sugar for lack of colour, pretty much like ``cold'' for low temperatures
(- honey, how is it outside?
 - oh, it's not hot, really not hot, like -20^oC).

But from the physicist point of view, we don't see anything as light is used to convey visual information. So no cars on the motorway, no packages delivered.