Pressing "build and run" button when building to WSA platform (specific build parameters are given below) editor shows such error:
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Exception: Failed to build Visual Studio project. Output:
UnityInstallationDir "C:\Program Files\Unity\Editor".
UnityWSAPlayerDir "C:\Program Files\Unity\Editor\Data\PlaybackEngines\metrosupport".
UnityProjectDir "C:\BUILD AND RUN TEST\510a3".
Copying unprocessed assemblies...
C:\BUILD AND RUN TEST\510a3\Assembly-CSharp-metro-vs2013.csproj(3,3): error MSB4019: The imported project "C:\BUILD AND RUN TEST\510a3\UnityCommon.props" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.
C:\BUILD AND RUN TEST\510a3\Assembly-CSharp-firstpass-metro-vs2013.csproj(3,3): error MSB4019: The imported project "C:\BUILD AND RUN TEST\510a3\UnityCommon.props" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.
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More of errors are in the attached log file "log.txt";

"Build and run" doesn't make error to appear when building to WSA, sdk8.1, without Unity C# projects

Reproducible on 4.5, 4.6. 5.0, 5.1;
Different version provides slightly different error messages;

Repro steps:
1. create an empty project;

2. set such settings in build settings:
>sdk: 8.0, without Unity C# projects
or
>sdk: 8.0, with Unity C# projects
or
>sdk: 8.1, with Unity C# projects

3. press "build and run" button;

Workaround: don't use "build and run" button.