我无法运行此命令：＆＃34; dotnet ef migration add＆＃34;。我收到错误消息＆＃34; Unhandled Exception：System.MissingMethodException：在程序集中找不到入口点＆＃39; Microsoft.EntityFrameworkCore.Design，Version = 1.0.1.0，Culture = neutral，PublicKeyToken = adb9793829ddae60＆＃39;。＆ ＃34 ;. 我遇到了this post，但它似乎无法解决我的问题。 下面是我的project.json文件。
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.1",
"type": "platform"
},
"Microsoft.AspNetCore.Mvc": "1.0.1",
"Microsoft.AspNetCore.Routing": "1.0.1",
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
"Microsoft.Extensions.Configuration.FileExtensions": "1.0.0",
"Microsoft.Extensions.Configuration.Json": "1.0.0",
"Microsoft.Extensions.Logging": "1.0.0",
"Microsoft.Extensions.Logging.Console": "1.0.0",
"Microsoft.Extensions.Logging.Debug": "1.0.0",
"Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
"ReportBook.Data": "1.0.0-*",
"Microsoft.EntityFrameworkCore.SqlServer": "1.0.1",
"Microsoft.AspNetCore.Diagnostics": "1.0.0",
"Microsoft.AspNetCore.Http.Abstractions": "1.0.0",
"Microsoft.AspNetCore.Diagnostics.Abstractions": "1.0.0",
"ReportBook.Repository": "1.0.0-*",
"Microsoft.AspNetCore.Authentication": "1.0.0",
"Microsoft.AspNetCore.Authentication.Cookies": "1.0.0",
"Microsoft.AspNetCore.Authentication.OpenIdConnect": "1.0.0",
"Repository.Pattern.EFCore": "1.0.0-*",
"ReportBook.Service": "1.0.0-*",
"Microsoft.AspNetCore.Identity": "1.0.0",
"AspNet.Security.OAuth.Validation": "1.0.0-alpha2-final",
"Microsoft.AspNetCore.Mvc.ViewFeatures": "1.0.1",
"AspNet.Security.OAuth.Introspection": "1.0.0-alpha2-final",
"Microsoft.AspNetCore.Authentication.Google": "1.0.0",
"Microsoft.AspNetCore.Authentication.Twitter": "1.0.0",
"Microsoft.EntityFrameworkCore": "1.0.1",
"Microsoft.EntityFrameworkCore.DynamicLinq": "1.0.3",
"Microsoft.ApplicationInsights.AspNetCore": "1.0.2",
"IdentityServer4": "1.0.0-rc2",
"SimpleIdentityServer.Authentication.Common": "1.0.0",
"Microsoft.AspNetCore.Authorization": "1.0.0",
"IdentityServer4.AccessTokenValidation": "1.0.1-rc2",
"System.Security.Cryptography.X509Certificates": "4.1.0",
"Microsoft.AspNetCore.DataProtection.Extensions": "1.0.0",
"Microsoft.AspNetCore.DataProtection.Abstractions": "1.0.0",
"Microsoft.AspNetCore.DataProtection": "1.0.0",
"Microsoft.NETCore.Platforms": "1.0.1",
"NETStandard.Library": "1.6.0",
"Microsoft.EntityFrameworkCore.Design": {
"type": "build",
"version": "1.0.1"
},
"Microsoft.EntityFrameworkCore.Relational": "1.0.1"
},
"frameworks": {
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"portable-net45+win8"
]
}
},
"publishOptions": {
"include": [
"wwwroot",
"**/*.cshtml",
"appsettings.json",
"web.config"
]
},
"runtimeOptions": {
"configProperties": {
"System.GC.Server": true
}
},
"scripts": {
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
},
"tools": {
"Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
"Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
}
}