相关疑难解决方法(0)

我有一个项目的解决方案.打开包管理器控制台,运行Install-Package MSBuildTasks但它在下面给出了一个错误:

Install-Package : The current environment doesn't have a solution open.
At line:1 char:16
+ Install-Package <<<<  MSBuildTasks 
    + CategoryInfo          : InvalidOperation: (:) [Install-Package], InvalidOperationExcep 
   tion
    + FullyQualifiedErrorId : NuGetNoActiveSolution,NuGet.PowerShell.Commands.InstallPackage 
   Command

我不明白为什么会这样.请建议我等待回复.谢谢