Can't install with dotnet SDK 1.X; 2.X can't install some sample projects

[JoshuaKGoldberg]

When I try to use dotnet restore with a 1.X SDK install, a dotnet restore error: Invalid input 'src\React.sln'. The file type was not recognized. pops up as part of dev-build.bat.

When I uninstall that and use a 2.X install, dotnet restore src\React.sln etc. fails with The specified SDK version [1.0.0] from global.json [C:\Code\React.NET\global.json] not found; install specified SDK version.

When I change global.json to reference "version": "2.0.0" instead of "version": "1.0.0", it complains about a trio of missing targets in sample projects, then installs the rest:

C:\Code\React.NET\src\React.Sample.Mvc4\React.Sample.Mvc4.csproj(198,3): error MSB4019: The imported project "C:\Program Files\dotnet\sdk\2.0.2\Microsoft\VisualStudio\v10.0\WebApplications\Microsoft.WebApplication.targets" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.
C:\Code\React.NET\src\React.Sample.Cassette\React.Sample.Cassette.csproj(204,3): error MSB4019: The imported project "C:\Program Files\dotnet\sdk\2.0.2\Microsoft\VisualStudio\v10.0\WebApplications\Microsoft.WebApplication.targets" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.
C:\Code\React.NET\src\React.Sample.Webpack\React.Sample.Webpack.csproj(181,3): error MSB4019: The imported project "C:\Program Files\dotnet\sdk\2.0.2\Microsoft\VisualStudio\v10.0\WebApplications\Microsoft.WebApplication.targets" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.
C:\Code\React.NET\src\React.Sample.Mvc4\React.Sample.Mvc4.csproj : warning NU1503: Skipping restore for project 'C:\Code\React.NET\src\React.Sample.Mvc4\React.Sample.Mvc4.csproj'. The project file may be invalid or missing targets required for restore. [C:\Code\React.NET\src\React.sln]
C:\Code\React.NET\src\React.Sample.Cassette\React.Sample.Cassette.csproj : warning NU1503: Skipping restore for project 'C:\Code\React.NET\src\React.Sample.Cassette\React.Sample.Cassette.csproj'. The project file may be invalid or missing targets required for restore. [C:\Code\React.NET\src\React.sln]
C:\Code\React.NET\src\React.Sample.Webpack\React.Sample.Webpack.csproj : warning NU1503: Skipping restore for project 'C:\Code\React.NET\src\React.Sample.Webpack\React.Sample.Webpack.csproj'. The project file may be invalid or missing targets required for restore. [C:\Code\React.NET\src\React.sln]

I'm guessing there's some part of the VS/dotnet install I'm missing?

[JoshuaKGoldberg]

Note: to get the rest of the installs running in the PackageRestore task, I commented out the dotnet restores in build.proj:

	<Target Name="RestorePackages" DependsOnTargets="Clean;UpdateVersion">
		<!-- NuGet packages for "legacy" projects (eg. React.Samples.Mvc4) -->
		<!-- <Exec
			WorkingDirectory="$(MSBuildProjectDirectory)"
			Command="tools\NuGet\nuget.exe restore $(SolutionFile)"
		/> -->
		<!-- NuGet packages for modern .csproj projects -->
		<!-- <Exec
			WorkingDirectory="$(MSBuildProjectDirectory)"
			Command="dotnet restore $(SolutionFile) /p:Version=$(VersionString)"
		/> -->

[JoshuaKGoldberg]

The imported project
"C:\Program Files\dotnet\sdk\2.0.2\Microsoft\VisualStudio\v10.0\WebApplications\Microsoft.WebApplication.targets" 
was not found

This actually exists in two locations on my machine:

• "C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\Microsoft\VisualStudio\v15.0\WebApplications\Microsoft.WebApplication.targets"
• "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\WebApplications\Microsoft.WebApplication.targets"

[Daniel15]

The project hasn't been updated to the .NET Core 2.0 SDK yet. It currently uses 1.1

There's a pull request to upgrade it to 2.0: #436. I might work on completing that PR and merge it, which should resolve some issues here.

[Daniel15]

C:\Code\React.NET\src\React.Sample.Mvc4\React.Sample.Mvc4.csproj(198,3): error MSB4019: The imported project "C:\Program Files\dotnet\sdk\2.0.2\Microsoft\VisualStudio\v10.0\WebApplications\Microsoft.WebApplication.targets" was not found. Confirm that the path in the declaration is correct, and that the file exists on disk.

This is the same issue I'm hitting while trying to get #436 working. It looks like the same issue as dotnet/sdk#1385.

[Daniel15]

dd4e504 should fix the issue with Microsoft.WebApplication.targets. Unfortunately I had to hard-code the path, as MSBuildExtensionsPath32 now points to the .NET Core directory rather than the MSBuild extensions directory.