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From Shad Storhaug <>
Subject RE: Using Apache Lucene.Net 4.8.0 with .NET Standard 1.5 and Visual Studio 2017
Date Sun, 07 May 2017 09:11:10 GMT

Since NUnit3 Test Adapter does not yet support it on .NET Core, we have not yet upgraded to
the new .csproj format that supports Visual Studio 2017. For the time being we have 2 separate
solution files.

Lucene.Net.sln - for .NET Framework 4.5.1
Lucene.Net.Portable.sln - for .NET Standard 1.5

You can open up Lucene.Net.Portable.sln in Visual Studio 2015, but it is not compatible with

Prerequisites for VS2015:

1.1 with SDK Preview 2.1 build 3177 -
Visual Studio 2015 (Community or greater) with Update 3
NUnit3 Test Adapter (if you need to run the tests) -

To get it to compile on .NET Standard you may need to run dotnet restore with Visual Studio
closed, and then open the Lucene.Net.Portable.sln solution in Visual Studio to build. It does
not always succeed when VS2015 runs the restore or if VS2015 has the solution open when you
run dotnet restore from the CLI.

Generally speaking, this setup is only required if you want to debug Lucene.Net or help contribute
to our efforts. If you just want to build you can build via CLI from the root of the project:

Build -pv:4.8.0-beta00001

Which will install the required SDK automatically, build DLLs for both frameworks and package
them up as .nupkg files in the release\NuGetPackages folder. Make sure you have a recent version
of Powershell before you run this command (still trying to work out some issues with earlier
versions, but I know it works for sure with 5.1.14393.1066). To determine what version of
Powershell you have:

Or if you just want to reference the NuGet packages, we have a CI feed available at
Pending the results of a release vote, we will have a beta available on NuGet in a couple
of days.

Shad Storhaug (NightOwl888)

-----Original Message-----
From: Anthony Gatlin [] 
Sent: Sunday, May 7, 2017 11:36 AM
Subject: Using Apache Lucene.Net 4.8.0 with .NET Standard 1.5 and Visual Studio 2017

On the Lucene.Net GitHub page (, it says that version
4.8.0 (the beta version currently available on GitHub) is compatible with the .Net Standard
1.5and .Net 4.5.1 frameworks. Fantastic!

I did a git clone to pull the code.
The solution opened right up and compiled in Visual Studio 2017 with no errors under the default
framework of .NET 4.5.1. All is well thus far.

*What I really need is to compile Lucene.NET 4.8.0 to work with .NET Core 1.1.x. This is where
things kind of went a bit sideways.*

When I opened up the properties page for the Lucene.Net project (as well as the many other
included projects), they are all referencing the default .NET 4.5.1. There does not appear
to be any option to reference .NET Standard 1.x  or .NET Core 1.x.y instead of a standard
.NET framework version.

I am sure this must be a really simple fix, but I am at a bit of a loss as to how get Lucene.Networking
with .Net Standard / .Net Core.

Here are a few quick notes that might be of interest.

   - The latest Dot Net Core SDK is installed on my machine.
   - I installed the NetStandard.Library to all projects using NuGet
   Package Manager. (The NetStandard.Library appears in the references for
   all projects with a blue and white icon. The solution still compiles but I
   am unable to drill down and see the constituent files in the
   NetStandard.Library as I can with other .NET Standard or .NET Core
   - I ran dotnet restore just in case that might have been needed to pull
   the various files needed for the NetStandard.Library.

   All of the projects in the solution contain [projectname].project.json files.
   After installing the NetStandard.Library to each project, there is now a
   dependencies entry in the [projectname].project.json file.

   "dependencies": { "NETStandard.Library": "1.6.1" }

   I did attempt to update just the framework entry in the
   Lucene.Net.project.json file to use .NETStandard,Version=1.5 and then
   recompile only the Lucene.Net project. I ended up with several compile
   errors so I reverted the entry to its orginal value of net451.
   - There is no .csproj file for any of the projects. I did not attempt to
   run dotnet migrate as I was unsure if it was necessary, and I did not
   want to introduce additional variables.

Any help here is much appreciated. Thank you so much!
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