在Microsoft.EntityFrameworkCore.Tool的DbContextOptionsBuilde

我在technet论坛上发现这篇文章,我用它作为参考：

https://social.technet.microsoft.com/wiki/contents/articles/37975.save-and-load-images-in-universal-windows-app-with-sqlite-and-entity-framework-core.aspx

按照说明操作时,我遇到了安装软件包Microsoft.EntityFrameworkCore.Tools(最新的稳定版本2.0.1)的问题：

PM>  Install-Package Microsoft.EntityFrameworkCore.Tools
  GET https://api.nuget.org/v3/registration3-gz/microsoft.entityframeworkcore.tools/index.json
  OK https://api.nuget.org/v3/registration3-gz/microsoft.entityframeworkcore.tools/index.json 74ms
Restoring packages for c:usersintuidocumentsvisual studio 2017ProjectsPicturesAppPicturesAppPicturesApp.csproj...
Install-Package : Package Microsoft.EntityFrameworkCore.Tools 2.0.1 is not compatible with uap10.0.10586 (UAP,Version=v10.0.10586). Package 
Microsoft.EntityFrameworkCore.Tools 2.0.1 supports: netstandard2.0 (.NETStandard,Version=v2.0)
At line:1 char:2
+  Install-Package Microsoft.EntityFrameworkCore.Tools
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [Install-Package],Exception
+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand

以前的版本(2.0.0)也出现了同样的问题,但是下一个以前的版本(1.1.4)已成功安装.

但是,我发现代码“PictureAppContext”类中使用的“DbContextOptionsBuilder”类无法识别方法“UseSqlite”：

Severity    Code    Description Project File    Line    Suppression State Error CS1061  'DbContextOptionsBuilder' does not contain a definition for 'UseSqlite' and no extension method 'UseSqlite' accepting a first argument of type "DbContextOptionsBuilder' could be found (are you missing a using directive or an assembly reference?)   PicturesApp c:usersintuidocumentsvisual studio 2017ProjectsPicturesAppPicturesAppPictureAppContext.cs   16  Active

谁知道如何解决这个问题？

谢谢！