可空操作员。？

Question

I recall I read this somewhere but am not able to find it in Google results now.

Does the newest C# (VS2013) support any such operator?

SomeObject.?SomeMember = SomeValue;

This is supposed to assign SomeValue to SomeObject.SomeMember only if SomeObject is not null.

NB: I know we can do this through HasValue and other ways. I'm just asking about the new operator.

Answer 1

Well it has nothing to do with Nullable types.It's null propagation operator and will work for each type that can be null, not just for Nullable<T> , reference types as well.

Does the newest C# (VS2013) support any such operator?

You could install Roslyn end user preview if you are using VS 2013, or Visual Studio 14 CTP 3

Answer 2

It is available in the Roslyn compiler and it's called Null-propagation - it's already implemented. Roslyn compiler will be available in VS 14 by default.

Answer 3

No, Visual Studio 2013 does not support such operator. Not out of the box at least.

If you want to use the null propagation operator , or any other C# 6 feature , you will have to install and use the CTP of Roslyn . Roslyn will be the default compile of Visual studio "14" though (we don't know its definitive name yet).