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Asked: 2026-05-14T04:42:30+00:00

I’m new to visual studio, coming from Delphi. I have a directory tree full

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I’m new to visual studio, coming from Delphi.

I have a directory tree full of .cs files (root is \Common).
I also have a directory tree full of Applications (root is \Applications)
Finally, I’ve got a tree full of Assemblies (root is \Assemblies)

I’d like to keep my .cs files in the Common tree and all the environment voodoo (solutions, projects, settings, metadata, debug data, bin, etc.) in the Assmblies tree. So, for a simple example, I’ve got an assembly called PdMagic.Common.Math.dll. The Solution and project is located in \Assemblies\Common\Math. All of its source (.cs) files are in \Common\Math. (matrix.cs, trig.cs, mathtypes.cs, mathfuncs.cs, stats.cs, etc.)

When I use Add Existing Item to add matrix.cs to my project, a copy of it is added to the \Assemblies\Common\Math folder. I just want to reference it. I don’t want multiple copies laying around. I’ve tried Add Existing Item, and used the drop down to “Add link” rather than just “Add”, and that seems to do what I want.

Question: What is the “best practice” for this sort of thing? Do most people just put those .cs files all in the same folder as the project? Why isn’t “Add link” the default?

Thanks!

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1 Answer

  1. Editorial Team

    The “best practice” in this case, is to not fight the tool. It allows you to do what you want, but you’ll get more work done and be able to focus on code if you just let the IDE organize your project for you.

    I would create an empty solution project called PdMagic.Common

    This will give you a file structure like

    PdMagic.Common\
PdMagic.Common\PdMagic.Common.sln

    then I generally add a src and libs folder (via the file system, not VS)

    inside the libs folder, i would place all my third party dependencies, and the src folder would hold all of my projects

    PdMagic.Common\
PdMagic.Common\PdMagic.Common.sln
PdMagic.Common\libs
PdMagic.Common\libs\nunit
PdMagic.Common\src

    Next, in Visual Studio, I would right click on the Solution I just created, and click “Add -> New Project”, I would specify that I wanted it created in the \src folder and call it PdMagic.Common.Math

    Now my folder structure would look like this

    PdMagic.Common\
PdMagic.Common\PdMagic.Common.sln
PdMagic.Common\libs
PdMagic.Common\libs\nunit
PdMagic.Common\src
PdMagic.Common\src\PdMagic.Common.Math
PdMagic.Common\src\PdMagic.Common.Math\PdMagic.Common.Math.csproj
PdMagic.Common\src\PdMagic.Common.Math\Class1.cs

    Then, as you add classes to your PdMagic.Common.Math project, they will go in the folder with the project file. This is how the IDE has the opinion we should work, and I think most developers go with it because trying to get any other layout on the file system would require too much fighting with the IDE. I know it can be hard to come from a different convention, and you instinctively want the same conventions in the new environment. However, if you stick with the conventions, (right or wrong in your opinion) you’ll get more done because you won’t be trying to force the IDE to do things the way you think they should be done.

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