CODEWITHSUNDEEP
c#c#-6.0null-propagation-operator
u936293
u936293

Reputation: 16214

Error when using the null-propagating / null-conditional operator

I am running a .NET 4.5 project in VS 2013. Why is the following code in error?

var w = Request.Properties["MS_HttpContext"] as System.Web.HttpContextWrapper;
string IP = w?.Request.UserHostAddress; //fail to compile

I found this code on this MSDN blog.

Upvotes: 5

Views: 3509

Answers (1)

Patrick Hofman
Patrick Hofman

Reputation: 156908

That is a new feature available in C# 6 and newer versions. It is called the null-conditional operator.

In order to use C# 6 you should download Visual Studio 2015 or a newer version, since the extension for Visual Studio 2013 isn't supported any more (see here).

Upvotes: 17

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