Error on loading Xamarin.Forms sample project -

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just playing xamarin.forms, downloaded sample project tipcalc here. when try open solution in xamarin studio getting error.

enter image description here

when try build project, error

error msb4019: imported project "c:\program files (x86)\msbuild\microsoft\portable\v4.5\microsoft.portable.csharp.targets" not found. confirm path in declaration correct, , file exists on disk. (msb4019) (tipcalc.android)

please guide me, should configure in project, make run successfully. using xamarin studio 5, os windows 7 ultimate.

i installed portable library tools followed xamarin.android fix this. error occurs if try load pcl project without installing portable library tools, because xamarin checks following file in machine while loading pcl project.

c:\program files (x86)\msbuild\microsoft\portable\v4.0microsoft.portable.csharp.targets


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