anchor.diff:          
           let private netStandard20References =
               lazy ImmutableArray.Create(NetStandard20.netStandard.Value, NetStandard20.mscorlibRef.Value, NetStandard20.systemRuntimeRef.Value, NetStandard20.systemCoreRef.Value, NetStandard20.systemDynamicRuntimeRef.Value)
  -        let private netCoreApp30References =
  -            lazy ImmutableArray.Create(NetCoreApp30.netStandard.Value, NetCoreApp30.mscorlibRef.Value, NetCoreApp30.systemRuntimeRef.Value, NetCoreApp30.systemCoreRef.Value, NetCoreApp30.systemDynamicRuntimeRef.Value, NetCoreApp30.systemConsoleRef.Value)
  +        let private netCoreApp31References =
  +            lazy ImmutableArray.Create(NetCoreApp31.netStandard.Value, NetCoreApp31.mscorlibRef.Value, NetCoreApp31.systemRuntimeRef.Value, NetCoreApp31.systemCoreRef.Value, NetCoreApp31.systemDynamicRuntimeRef.Value, NetCoreApp31.systemConsoleRef.Value)
   
           let internal getReferences tf =
               match tf with
                   | TargetFramework.NetStandard20 -> netStandard20References.Value
  -                | TargetFramework.NetCoreApp30 -> netCoreApp30References.Value
  +                | TargetFramework.NetCoreApp31 -> netCoreApp31References.Value
   
       type RoslynLanguageVersion = LanguageVersion
   
  
positive.code:             let systemDynamicRuntimeRef = lazy AssemblyMetadata.CreateFromImage(TestResources.NetFX.netstandard20.System_Dynamic_Runtime).GetReference(display = "System.Dynamic.Runtime.dll (netstandard 2.0 ref)")
  
          [<RequireQualifiedAccess>]
          module NetCoreApp30 =
              let netStandard = lazy AssemblyMetadata.CreateFromImage(TestResources.NetFX.netcoreapp30.netstandard).GetReference(display = "netstandard.dll (netcoreapp 3.0 ref)")
              let mscorlibRef = lazy AssemblyMetadata.CreateFromImage(TestResources.NetFX.netcoreapp30.mscorlib).GetReference(display = "mscorlib.dll (netcoreapp 3.0 ref)")
              let systemRuntimeRef = lazy AssemblyMetadata.CreateFromImage(TestResources.NetFX.netcoreapp30.System_Runtime).GetReference(display = "System.Runtime.dll (netcoreapp 3.0 ref)")
              let systemCoreRef = lazy AssemblyMetadata.CreateFromImage(TestResources.NetFX.netcoreapp30.System_Core).GetReference(display = "System.Core.dll (netcoreapp 3.0 ref)")
              let systemDynamicRuntimeRef = lazy AssemblyMetadata.CreateFromImage(TestResources.NetFX.netcoreapp30.System_Dynamic_Runtime).GetReference(display = "System.Dynamic.Runtime.dll (netcoreapp 3.0 ref)")
              let systemConsoleRef = lazy AssemblyMetadata.CreateFromImage(TestResources.NetFX.netcoreapp30.System_Console).GetReference(display = "System.Console.dll (netcoreapp 3.0 ref)")
  
      [<RequireQualifiedAccess>]
      module private TargetFrameworkUtil =
  
negative.code:     [<RequireQualifiedAccess>]
      type TargetFramework =
          | NetStandard20
          | NetCoreApp31
  
      module private TestReferences =
  
  