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Editorial Team
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Asked: 2026-05-26T12:36:49+00:00

I have a solution with multiple F# projects. I can easily reference between projects

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I have a solution with multiple F# projects. I can easily reference between projects using relative path.

However, if I want to use that project in a .fsx file in another project, I have to provide the absolute path to the corresponding dll file, which is quite inconvenient. I notice that F# Powerpack could be referenced in F# Interactive in a convenient way:

#r "FSharp.Powerpack.dll"

How can I register a path to F# Interactive permanently or reference a project to use in F# Interactive without providing the absolute path?

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1 Answer

  1. Editorial Team

    As Daniel pointed out, F# PowerPack can be referenced using the short name, because it is installed to the GAC (Global Assembly Cache). This requires the assembly to be signed and I generally wouldn’t use it often for non-system libraries.

    If the location of your assembly is always the same, relatively to the F# script file (i.e. if the script file is a part of the project), then you can use a relative path:

    #r @"..\Library\bin\Debug\Library.dll"

    Another alternative is to create some custom folder and tell F# Interactive to search for assemblies in that folder. This can be done by adding a command line argument -I:"C:\your\folder" to the F# Interactive process (In Visual Studio, go to “Options”, then “F# Tools” and change “F# Interactive options”).

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