Start VS2017 from the right path

Author: kzu

src/VisualStudio/NuGet.Packaging.VisualStudio.Shared.targets

@@ -11,7 +11,8 @@
 		<DeployExtension Condition="'$(Configuration)' != 'Debug' Or '$(VisualStudioVersion)' != '$(TargetVSVersion)'" >false</DeployExtension>
 
 		<StartAction>Program</StartAction>
-		<StartProgram>$(MSBuildProgramFiles32)\Microsoft Visual Studio $(VisualStudioVersion)\Common7\IDE\devenv.exe</StartProgram>
+		<StartProgram Condition="'$(VisualStudioVersion)' &lt; '15.0'">$(MSBuildProgramFiles32)\Microsoft Visual Studio $(VisualStudioVersion)\Common7\IDE\devenv.exe</StartProgram>
+		<StartProgram Condition="'$(VisualStudioVersion)' &gt;= '15.0'">$(VsInstallRoot)\Common7\IDE\devenv.exe</StartProgram>
 		<StartArguments>/rootsuffix exp</StartArguments>
 		<NoGlobalAssemblyInfo>true</NoGlobalAssemblyInfo>
 		<XmlNs>&lt;Namespace Prefix='vs' Uri='http://schemas.microsoft.com/developer/vstemplate/2005'/&gt;</XmlNs>