2017.3 > which version of Mono and C# is currently supported?

Unity Engine
1

Trying to upgrade my C# chops this year but was curious which features and version of C# does the latest Unity currently support? Is there a list somewhere with all the C# features?

2

Basically, I’d just go look up about what’s new in C# 6.0. For example:

Of these, I find string interpolation to be the most useful on a day-to-day basis. So:

// Instead of this:
var s = string.Format("{0}, {1}, {2}", arg0, arg1, arg2);
// You can now do this:
var s = $"{arg0}, {arg1}, {arg2}";

It doesn’t sound like much, but it saves a lot of hassle when modifying an expression, and avoids cases like this where you used the wrong args:

// Oops: This causes an exception because you forgot the 3rd argument.
var s = string.Format("{0}, {1}, {2}", arg0, arg1);

The null-conditional is pretty nice, and can cut down on the verbosity of your code. So:

// Instead of this:
int x;
if (a != null && a.b != null && a.b.c != null) {
    x = a.b.c.d;
}
// You can now do this:
int x = a?.b?.c?.d;

The “?” null-conditional operator automatically short circuits if it hits a null, instead of giving you a null reference exception.

The new ‘nameof’ is also pretty useful when generating messages related to a specific variable.