Build.cake:

#tool "nuget:?package=vswhere&version=2.6.7"

Task("Default").Does(() =>  
{
    var msbuild = GetFiles(VSWhereLatest() + "/**/MSBuild.exe").FirstOrDefault();
    var vstest = GetFiles(VSWhereLatest() + "/**/vstest.console.exe").FirstOrDefault();

    Information("MSBuild: " + msbuild);
    Information("VSTest: " + vstest);
});

RunTarget("Default");  
MSBuild: C:/Program Files (x86)/Microsoft Visual Studio/2019/Enterprise/MSBuild/Current/Bin/MSBuild.exe  
VSTest: C:/Program Files (x86)/Microsoft Visual Studio/2019/Enterprise/Common7/IDE/CommonExtensions/Microsoft/TestWindow/vstest.console.exe