C# 6.0 => Operator

Question

I'm using visual studio 2013. I found a project in github, that project is using Visual Studio 2015. I'm trying to compile it but I get an error using vs2013

Invalid token ';' in class, struct, or interface member declaration

Here code's :

private readonly Log _log;
public Log Log => _log; // What => Operator is doing ? Pointer ?

Yes, What new features of => operator in C# [6.0]? and is there any way to use C# 6.0 in vs2013?

http://stackoverflow.com/questions/27093908/how-to-enable-c-sharp-6-0-feature-in-visual-studio-2013 — matcheek, Oct 27 '16 at 13:38
C# 6.0 was introduced with VS 2015. There is no way to use it in VS 2013. https://github.com/dotnet/roslyn/wiki/New-Language-Features-in-C%23-6#expression-bodies-on-property-like-function-members — c0d3b34n, Oct 27 '16 at 13:40
c# 6 has been introduced with Visual Studio 2015 so you only can use the body expression in VS 15 or later version — Tinwor, Oct 27 '16 at 13:56
I like how [two questions about that operator](http://stackoverflow.com/questions/40282424/what-does-operator-mean-in-a-property-in-c) are asked the same day. :) — Visual Vincent, Oct 27 '16 at 14:09

score 7 · Answer 1 · answered Oct 27 '16 at 13:40

7

It is a shorter version to write a readonly property.

public Log Log => _log;

equals

public Log Log { get { return _log; } }

But I know of no way to use this feature in older versions.

answered Oct 27 '16 at 13:40

dryman

660
6
16

score 2 · Accepted Answer · edited May 23 '17 at 11:48

This is an expression-bodied property, a new syntax for computed properties introduced in C# 6, which lets you create computed properties in the same way as you would create a lambda expression. So:

public int TwoTimes(int number)
{
    return 2*number;
}

is equivalent to

public int TwoTimes(int number) => 2 * number;

Note: C# 6.0 was introduced with VS 2015. You can not use it with an earlier version.

Ref: What does "=>" operator mean in a property in C#?

score 1 · Answer 3 · edited Oct 27 '16 at 14:33

1

The problem is Visual Studio 2013 doesnt support C# 6.0. Convert it in an older way, like in answer before

private readonly Log _log;
public Log Log 
{
    get { return _log; }
}

edited Oct 27 '16 at 14:33

c0d3b34n

534
7
14

answered Oct 27 '16 at 13:42

Alex Pashkin

301
4
15

C# 6.0 => Operator

3 Answers3