依賴不支持框架.NETStandard，版本= V1.6，Visual Studio的2015.3

我在對.NET核心的Visual Studio 2015.3創建.NET類庫：https://www.nuget.org/packages/MD.PersianDateTime.Core/
依賴不支持框架.NETStandard，版本= V1.6，Visual Studio的2015.3

以上套餐的Project.json：

{ 
    "authors": [ "Mohammad Dayyan" ], 
    "copyright": "By Mohammad Dayyan, 0903-3339923", 
    "dependencies": { 
    "NETStandard.Library": "1.6.1" 
    }, 
    "description": "C# library to use PersianCalendar as easy as DateTime", 
    "frameworks": { 
    "netstandard1.6": { 
     "imports": "dnxcore50" 
    } 
    }, 
    "licenseUrl": "http://www.gnu.org/licenses/gpl-3.0-standalone.html", 
    "name": "MD.PersianDateTime.Core", 
    "title": "PersianDateTime", 
    "version": "1.0.0-*", 
    "buildOptions": { 
    "xmlDoc": true 
    } 
}

現在，我想用它在其他.NET核心類庫，具有以下package.json：

{ 
    "dependencies": { 
    "NETStandard.Library": "1.6.1", 
    "Newtonsoft.Json": "9.0.1", 
    "MD.PersianDateTime.Core": "1.0.0.1" 
    }, 
    "frameworks": { 
    "netstandard1.6": { 
     "imports": "dnxcore50" 
    } 
    }, 
    "name": "Another .Net Core Class Library", 
    "version": "1.0.0-*" 
}

但我得到以下錯誤在編譯：

Severity Code Description Project File Line Suppression State 
Error NU1002 The dependency MD.PersianDateTime.Core 1.0.0.1 does not support framework .NETStandard,Version=v1.6. SmartizCore C:\Works\SmartizCore\src\SmartizCore\project.json 7

編輯：
我安裝從以下鏈接最新版本的.NET核心SDK和運行時：
https://github.com/dotnet/core/blob/master/release-notes/rc4-download.md 所以我對.NET核心版本爲以下：

但在Visual Studio中，我得到以下版本