什么是正确的名称？ 运营商？

Question

I had a look on MSDN but they don't seem to refer to it by name.

What's the official name for the ?? operator?

Answer 1

它被称为null-coalescing运算符 。

Answer 2

It is called null-coalescing operator .

Look at The C# ?? null coalescing operator from Scott Guthrie.

One of the subtle language features of C# is the ?? "null coalescing" operator. This provides a nice, terse way to check whether a value is null, and if so return an alternate value.

Answer 3

The operator ?? is called null-coalescing operator