asp.net - Errors after upgrading to netcoreapp2.0 -


i upgraded asp.net core solution netcoreapp1.1 netcoreapp2.0:

  • i used upgrade guide
  • installed new sdk
  • upgraded vs2017 15.3.1
  • removed old nuget packages, , replaced them new metapackage
  • cleaned solution, manually deleted bin , obj directories, , rebuilt

i tried tips found such as:

  • removed packagetargetfallback / assettargetfallback not necessary
  • ensured csproj don't have runtimeframeworkversion / netstandardimplicitpackageversion
  • tried , without global.json in solution root { "sdk": { "version": "2.0.0" } }
  • deleted .vs directory in solution root
  • cleared nuget package cache (tools-options-nuget-clear), , restored

however lots of errors this:

the type 'object' defined in assembly not referenced. must add reference assembly 'netstandard, version=2.0.0.0, culture=neutral, publickeytoken=cc7b13ffcd2ddd51'.

what more must do?

turns out had directory.build.props file in solution root, had common msbuild stuff projects in solution.

that file referenced netcoreapp1.1. once updated netcoreapp2.0, worked.


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