我正在构建Windows Phone 8，当我尝试安装AutoMapper Package时，我遇到了这些错误：
PM> Install-Package AutoMapper
Installing 'AutoMapper 3.1.0'.
Successfully installed 'AutoMapper 3.1.0'.
Adding 'AutoMapper 3.1.0' to AutoMapper.
Successfully added 'AutoMapper 3.1.0' to AutoMapper.
Method invocation failed because [Microsoft.Build.Construction.ProjectMetadataElement] doesn't contain a method named 'Where'.
At C:\users\documents\visual studio 2012\Projects\AutoMapper\packages\AutoMapper.3.1.0\tools\wp8\Install.ps1:14
char:3
+ $refPath = $platformSpecificRef.Metadata.Where({ $_.Name -eq "HintPath" }).Val ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : MethodNotFound
Exception calling "AddItem" with "2" argument(s): "Parameter "include" cannot have zero length."
At C:\users\miniesoft limited\documents\visual studio 2012\Projects\AutoMapper\packages\AutoMapper.3.1.0\tools\wp8\Install.ps1:16
char:3
+ $item = $msbuild.Xml.AddItem("Content", $refPath)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : ArgumentException
You cannot call a method on a null-valued expression.
At C:\users\miniesoft limited\documents\visual studio 2012\Projects\AutoMapper\packages\AutoMapper.3.1.0\tools\wp8\Install.ps1:17
char:3
+ $item.AddMetadata("Link", [System.IO.Path]::GetFileName($refPath))
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull
You cannot call a method on a null-valued expression.
At C:\users\miniesoft limited\documents\visual studio 2012\Projects\AutoMapper\packages\AutoMapper.3.1.0\tools\wp8\Install.ps1:18
char:3
+ $item.AddMetadata("CopyToOutputDirectory", "PreserveNewest")
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull
应用程序无法运行，有什么想法吗？