現在將EF1.1升級到EF2.0後，我無法進行遷移。從EF Core 1.1升級到2.0預覽
Error: Startup project 'QilinSystem.Store.Data.csproj' targets framework '.NETStandard'. This framework is not intended for execution and may fail to resolve runtime dependencies. If so, specify a different project using the --s tartup-project option and try again.
如何解決這個問題？
EF Core 2.0 Preview 1需要Visual Studio 15.3 Preview，所以你必須安裝它。
Announcing EF Core 2.0 Preview 1：
Accessing .NET Core tooling in Visual Studio requires Visual Studio 2017 15.3 Preview, Visual Studio for Mac or Visual Studio Code. More information about this and download links can be found in the .NET Core 2.0 Preview 1 announcement.
Preview installs next to your stable Visual Studio IDE, allowing you to use either independently.