How Do I Use Using System.Linq

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C#

how do i enable using system.linq
namespace does not exist message
im using VS 2015 RC

Posted 3-Aug-15 4:09am

jamesmc1535

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Sergey Alexandrovich Kryukov 3-Aug-15 10:51am

This is because you don't understand the basics: assemblies and namespaces. You cannot "use using". Using is nothing but syntactic sugar which helps you to shorten top-level type names. To really use an assembly, you have to reference it.
—SA

jamesmc1535 3-Aug-15 11:04am

i know as you can see i asked how do i enable it , cos i cant find system.core under add > refrence

Sergey Alexandrovich Kryukov 3-Aug-15 11:19am

Create a new project from scratch (from a template). Can you see System.Core now?
—SA

jamesmc1535 3-Aug-15 11:21am

no , as a matter of fact my program i made in framework 3.0 which isnt supported, so ima just change it to 4.5 then it will work,

Sergey Alexandrovich Kryukov 3-Aug-15 11:23am

Certainly, in older .NET, there were no LINQ. :-)
—SA

Afzaal Ahmad Zeeshan 3-Aug-15 11:02am

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Afzaal Ahmad Zeeshan · Accepted Answer · 2015-08-03T04:30:00

Solution 1

I have tried using the same in Visual Studio 2015 and it works. Just make sure that you are referencing the System.Core.dll library in your project, that is where System.Linq is declared in.

Double-click References and check if System.Core is present in the list, if not then Right-click on Reference, and select Add Reference. From the window opened, select System.Core and click Add. That way, now if you try to use the namespace (hopefully by using System.Linq;) it would work.

For more about this namespace please read: https://msdn.microsoft.com/en-us/library/system.linq(v=vs.111).aspx[^]

Posted 3-Aug-15 4:30am

Afzaal Ahmad Zeeshan

Updated 3-Aug-15 5:20am

v2

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jamesmc1535 3-Aug-15 10:31am

thanks

Afzaal Ahmad Zeeshan 3-Aug-15 10:32am

You're most welcome.

jamesmc1535 3-Aug-15 10:48am

System.Core.dll < cant find it
refrence>add refrence>assemblies>framewor> its not there

Afzaal Ahmad Zeeshan 3-Aug-15 10:59am

In my case, it is present there. Make sure your framework is installed without any problem.

Sergey Alexandrovich Kryukov 3-Aug-15 10:52am

5ed, but... the inquirer probably lacks more basic understanding. Please see my comment to the question.
—SA

Afzaal Ahmad Zeeshan 3-Aug-15 10:53am

Thank you, Sergey.

jamesmc1535 3-Aug-15 11:04am

i might lack basic understanding -_- , but if u read clearly you could see that i asked how do i _enable_ it ,

Sergey Alexandrovich Kryukov 3-Aug-15 11:19am

I already answered. You just did not realize it.
—SA

Sergey Alexandrovich Kryukov 3-Aug-15 11:20am

Assuming "System.Code" was a typo, I edited it; would you mind?
—SA

Afzaal Ahmad Zeeshan 3-Aug-15 12:17pm

I would perhaps thank you for that fix, I wonder how I tripped on that twice.