A Project with an output type of Class Library cannot be started directly.

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I have installed Async-CTP-v3 for using new feature of C# 5 but when I tried to run a console application using async keyword/await expression this error appeared:

"A Project with an output type of Class Library cannot be started directly.

In order to debug this project, add an executable project to this solution which references the library project. Set the executable project as the startup project."

Is there anyone can help me? Thanks.

Posted 30-Jul-12 10:00am

z_azad

Updated 28-Jan-21 2:31am

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[no name] 30-Jul-12 16:01pm

Change your project output type or change the startup project from a DLL to an exe project.

Sergey Alexandrovich Kryukov 30-Jul-12 18:45pm

That is the real answer. I don't your Solution 1 is relevant. This is an error message from VS which OP could not understand -- you just explained it.
--SA

[no name] 30-Jul-12 18:51pm

We both said the same thing, I think. OP just liked the SO answer better I think.

Sergey Alexandrovich Kryukov 30-Jul-12 19:17pm

I did not say anything to OP -- you did. I just say, the real answer is above, not below.
--SA

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Nayeem Mansoori · Accepted Answer · 2012-11-22T23:52:00

Solution 2

You need to set as startup project.
Right click on your project and click set as startup project than will run your project
i hope this will help for you.
bye..

Posted 22-Nov-12 23:52pm

Nayeem Mansoori

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Member 2178279 28-Apr-16 3:07am

Thanx its working for me.

Wes Aday · Accepted Answer · 2012-07-30T10:16:00

Solution 1

To get this off the unanswered list, this question was answered here[^]

Posted 30-Jul-12 10:16am

Wes Aday