You also don't have to use imports at all in C# code - you can just reference everything absolutely using the full namespace and class name.

That's a big difference compared to the other languages. C# automatically loads the correct assembly (.NET library) on the first call to something contained within it, whereas languages like Python require an import statement because that's what loads the library. I don't think autoloading is very common - C#, PHP, Ruby and Perl use it, but I can't think of other languages that do.