c# - Cannot Install Web Grease 1.5.1 -

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when try install web grease 1.5.1 error:

you cannot call method on null-valued expression. @ l:\project_path\packages\webgrease.1.5.2\tools\install.ps1:45 char:5 +     $msbuild.xml.addproperty("webgreaselibpath", $relativepackageuri.tostring(). ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + categoryinfo          : invalidoperation: (:) [], runtimeexception + fullyqualifiederrorid : invokemethodonnull

delete folders inside "packages" folder in application folder. try reinstall web grease nuget. see if solves issue.


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