.NET Core 2.0 Console app with DirectoryCatalog compiles nicely but fails during publish

[sdg002]

Hi All,
My environment is Visual Studio 2017, 15.9.11 on Windows 10. I am facing a problem with using the DirectoryCatalog class. This is a very simple project. It compiles and debugs fine. But, publishing will not work.

Detailed steps

1. Create an empty .NET Core 2.0 Console app
2. Add the line

Console.WriteLine("Hello word");

3. Build the proect
4. Now publish the project using the parameters (self-contained, win-x64)
5. Publishing should work fine. No errors at this stage
6. Add the following nuget package

Install-Package System.ComponentModel.Composition -Version 4.5.0

6.Add the line to Main function.

DirectoryCatalog d = new DirectoryCatalog("c:\");

7.Build the project. Everything works fine.
8. Now try publishing using the same profile that was created in the earlier steps
9. Publishing fails with the following error message.

The type or namespace name 'Composition' does not exist in the namespace 'System.ComponentModel' (are you missing an assembly reference?)

10. It appears as though, the Publish step is referencing some other version of the assembly System.ComponentModel.Composition.dll , a version which does not contain the class DirectoryCatalog.

Full error message from the output window after Publish

2>Restoring packages for C:\Users\saurabhd\MyTrials\MefConsole001\MefConsole001\MefConsole001.csproj...
2>Restore completed in 637.23 ms for C:\Users\saurabhd\MyTrials\MefConsole001\MefConsole001\MefConsole001.csproj.
2>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0\Bin\Roslyn\csc.exe /noconfig /unsafe- /checked- /nowarn:1701,1702,1701,1702,2008 /nostdlib+ /platform:x64 /errorreport:prompt /warn:4 /define:TRACE;RELEASE;NETCOREAPP;NETCOREAPP2_0 /errorendlocation /preferreduilang:en-US /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\Microsoft.CSharp.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\Microsoft.VisualBasic.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\Microsoft.Win32.Primitives.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\mscorlib.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\netstandard.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.AppContext.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Buffers.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Collections.Concurrent.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Collections.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Collections.Immutable.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Collections.NonGeneric.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Collections.Specialized.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ComponentModel.Annotations.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ComponentModel.Composition.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ComponentModel.DataAnnotations.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ComponentModel.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ComponentModel.EventBasedAsync.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ComponentModel.Primitives.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ComponentModel.TypeConverter.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Configuration.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Console.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Core.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Data.Common.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Data.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.Contracts.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.Debug.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.DiagnosticSource.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.FileVersionInfo.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.Process.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.StackTrace.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.TextWriterTraceListener.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.Tools.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.TraceSource.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Diagnostics.Tracing.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Drawing.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Drawing.Primitives.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Dynamic.Runtime.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Globalization.Calendars.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Globalization.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Globalization.Extensions.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.Compression.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.Compression.FileSystem.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.Compression.ZipFile.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.FileSystem.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.FileSystem.DriveInfo.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.FileSystem.Primitives.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.FileSystem.Watcher.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.IsolatedStorage.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.MemoryMappedFiles.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.Pipes.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.IO.UnmanagedMemoryStream.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Linq.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Linq.Expressions.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Linq.Parallel.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Linq.Queryable.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.Http.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.HttpListener.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.Mail.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.NameResolution.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.NetworkInformation.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.Ping.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.Primitives.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.Requests.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.Security.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.ServicePoint.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.Sockets.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.WebClient.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.WebHeaderCollection.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.WebProxy.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.WebSockets.Client.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Net.WebSockets.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Numerics.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Numerics.Vectors.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ObjectModel.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Reflection.DispatchProxy.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Reflection.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Reflection.Emit.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Reflection.Emit.ILGeneration.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Reflection.Emit.Lightweight.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Reflection.Extensions.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Reflection.Metadata.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Reflection.Primitives.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Reflection.TypeExtensions.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Resources.Reader.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Resources.ResourceManager.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Resources.Writer.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.CompilerServices.VisualC.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.Extensions.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.Handles.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.InteropServices.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.InteropServices.RuntimeInformation.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.InteropServices.WindowsRuntime.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.Loader.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.Numerics.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.Serialization.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.Serialization.Formatters.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.Serialization.Json.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.Serialization.Primitives.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Runtime.Serialization.Xml.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Security.Claims.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Security.Cryptography.Algorithms.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Security.Cryptography.Csp.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Security.Cryptography.Encoding.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Security.Cryptography.Primitives.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Security.Cryptography.X509Certificates.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Security.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Security.Principal.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Security.SecureString.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ServiceModel.Web.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ServiceProcess.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Text.Encoding.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Text.Encoding.Extensions.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Text.RegularExpressions.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Threading.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Threading.Overlapped.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Threading.Tasks.Dataflow.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Threading.Tasks.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Threading.Tasks.Extensions.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Threading.Tasks.Parallel.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Threading.Thread.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Threading.ThreadPool.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Threading.Timer.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Transactions.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Transactions.Local.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.ValueTuple.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Web.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Web.HttpUtility.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Windows.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Xml.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Xml.Linq.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Xml.ReaderWriter.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Xml.Serialization.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Xml.XDocument.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Xml.XmlDocument.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Xml.XmlSerializer.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Xml.XPath.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\System.Xml.XPath.XDocument.dll /reference:C:\Users\saurabhd\.nuget\packages\microsoft.netcore.app\2.0.9\ref\netcoreapp2.0\WindowsBase.dll /debug- /debug:portable /filealign:512 /optimize+ /out:obj\Release\netcoreapp2.0\win-x64\MefConsole001.dll /ruleset:"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Team Tools\Static Analysis Tools\\Rule Sets\MinimumRecommendedRules.ruleset" /target:exe /warnaserror- /utf8output /deterministic+ Program.cs "C:\Users\saurabhd\AppData\Local\Temp\.NETCoreApp,Version=v2.0.AssemblyAttributes.cs" obj\Release\netcoreapp2.0\win-x64\MefConsole001.AssemblyInfo.cs /warnaserror+:NU1605
2>The type or namespace name 'Composition' does not exist in the namespace 'System.ComponentModel' (are you missing an assembly reference?)
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
========== Publish: 0 succeeded, 1 failed, 0 skipped ==========

Where am I going wrong?
Thanks,
Sau

[scalablecory]

DirectoryCatalog is only supported starting in .NET Core 2.1, not 2.0. Please try to upgrade -- I suggest to .NET Core 2.2 -- and let us know if that works!

That VS was allowing you to build is suspect; I'd be interested in seeing a full sample project that builds in VS but not with "dotnet build" if you want to upload one.

[sdg002]

Hi,

Thanks for the quick response.
Yes. It works well with .NET Core 2.1.

With regards to the problem with .NET Core 2.0, it would be imperative if Visual Studio tooling can be improved to give the right warnings during compilation itself. My sample CSPROJ attached. Hope this helps.

ConsoleAppMef001.zip

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[ericstj]

This is happening because on publish the SDK references a newer version of Microsoft.NETCore.App which has a higher file version of System.ComponentModel.Composition. That version ("4.6.26614.1") wins over the version in this NuGet package ("4.6.26515.06"). This is only a problem in .NETCore 2.0 because at that time we had a System.ComponentModel.Composition.dll in the framework which only included a type forward. This was fixed in dotnet/corefx#24921 by removing that file from the framework, but of course that fix only went into 2.1 (since that's when we shipped and supported System.ComponentModel.Composition).

You can reference the newer version of System.ComponentModel.Composition package to avoid this problem.

    <PackageReference Include="System.ComponentModel.Composition" Version="4.6.0" />

This version, and later versions, will always have a higher file version than those in .NETCore2.0 and avoid this issue.