.NET and .net core share file among projects

Question

We have some .cs files in our project A that are needed in Project B.

First question : how do I share the files across projects without recreating them in the other project?

Second question : if Project A is made in .Net and Project B is made in .NET Core , how can we share files without having them to recreate in both projects?

I am using C#

Answer 1

you create cs file in .net project and share the same file in .net core project.

<ItemGroup>
  <Compile Include="..\dotnetproject\somefile.cs" Link="somefile.cs" />
</ItemGroup>

https://andrewlock.net/including-linked-files-from-outside-the-project-directory-in-asp-net-core/

Answer 2

It sounds like you are asking for how to add a Linked File reference to a project. If you are using Visual Studio:

1. Right-click second project (the one that does not contain the file)
2. Add > Existing Item...
3. Browse to the file you want to link in
4. Click the down arrow on the Add button and choose Add As Link

Edit: The original post did not specify whether the two projects exist within the same Visual Studio solution, or two entirely separate solutions / repositories / etc. Linked Files as I described above work for sharing files across projects within the same solution.

For projects that exist in two completely different solutions, git repos, etc, a shared common library is the best approach. Since one of the projects is a .NET Core app, the shared library should be an appropriate NETStandard library. NETStandard libraries can be referenced by both Full Framework .NET and .NET Core applications.

For more details, see:

• .NET Standard (Microsoft Docs)
• .NET Standard Library code sharing