A project with an output type of class library can not be started directly

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I have created 3-tier architecure in Asp.net (in Visual Studio 2012)
1) BusinessLogic Layer taken as class library project.
2) Businessobject Layer as class library project.
3) Dataaccess Layer as Class library type.
4) for presentation layer I have created master page and then add web form name as Home using master page. now i have set this web form (Home) as start up page

What I have tried:

In presentation layer I have selected Home Page. now i have set this web form (Home) as start up page

Posted 30-Mar-17 9:03am

paul_vin

Updated 30-Mar-17 9:42am

Bryian Tan

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Bryian Tan 30-Mar-17 15:18pm

Did you set presentation layer (Web) as Start up project?

[no name] 30-Mar-17 15:20pm

Has nothing at all to do with your startup page. It's your startup project where the problem is.

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OriginalGriff · Answer 1 · 2017-03-30T09:42:00

You cannot set any project that generates a class library as the Startup Project in VS: the produce DLL files rather than EXE and do not contain a Main method which the system needs in order to run an application.

Set an executable project as your Startup Project by right clicking it's name in the Solution Explorer.