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Asked: 2026-05-26T00:45:32+00:00

i have c# library project. i add it (library.sln) as a existing project to

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i have c# library project. i add it(library.sln) as a existing project to my project. so it comes to my solution explorer.

but in my forms when i try to access it, it seems it dose not exist using library; is noting !
where am i wrong, and what i need to do ?

it can not be build itself in visual studio when i try to debug project, the error is : 

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

you can see the library project here http://www.codeproject.com/KB/selection/FarsiLibrary.aspx?msg=4043318#xx4043318xx and it have 4 namespace.

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1 Answer

  1. Editorial Team

    You need to use the “Set as StartUp Project” option in your context menu to set a runnable project. The project “library” you created is probably a class library which is not runnable.

    Create some runnable project e.g. Condole application to use your library and set that as startup project. Then run your project.

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