Allow null-coalescing operator on void function

[Thaina]

Since C# could shorthand many things as one line expression. But sometimes we just want to call some void function in the expression and return value. Which is not possible

So I think it would be easier if we can write it like this

int i = IsTrue switch {
    false => Console.WriteLine("false is 0") ?? 0;
    true => Console.WriteLine("true is 1") ?? 1;
};

if(i > 0 && (Console.WriteLine("i is true, is i valid ?" + i) ?? i < 2))
    DoSomething();

var values = dictionary.Select((item) => Console.WriteLine(item.Key + " : " + item.Value) ?? item.Value).ToArray();

[svick]

I don't think this syntax makes sense, because void is not null. The syntax proposed by Sequence Expressions #377 achieves the same goal and I find it much more sensible