小编Bru*_*sen的帖子

我有一个.NET Framework 4.6.1 WebApi项目,该项目引用了我们在内部用于共享常用实用程序方法的小型NuGet包.

我们想开始将一些东西移植到.NET Core,因此我将实用程序包更改为目标.NET Standard 2.0.这是通过简单地创建一个新的.NET Standard 2.0项目并复制源文件来完成的.

实用程序包csproj:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
  </PropertyGroup>

</Project>

在我的WebApi项目中更新包后,我在启动时收到以下异常:

[MissingMethodException: Method not found: 'System.Collections.ObjectModel.Collection`1<System.Net.Http.Headers.MediaTypeHeaderValue> System.Net.Http.Formatting.MediaTypeFormatter.get_SupportedMediaTypes()'.]
   MyWebApiProject.Application.InitializeHttpConfiguration(HttpConfiguration config) in C:\MyWebApiProject\Global.asax.cs:44
   System.Web.Http.GlobalConfiguration.Configure(Action`1 configurationCallback) +34
   MyWebApiProject.Application.OnApplicationStarted() in C:\MyWebApiProject\Global.asax.cs:62
   Ninject.Web.Common.NinjectHttpApplication.Application_Start() +183

[HttpException (0x80004005): Method not found: 'System.Collections.ObjectModel.Collection`1<System.Net.Http.Headers.MediaTypeHeaderValue> System.Net.Http.Formatting.MediaTypeFormatter.get_SupportedMediaTypes()'.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +10104513
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +118
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +173
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +336
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +296

[HttpException (0x80004005): Method not found: 'System.Collections.ObjectModel.Collection`1<System.Net.Http.Headers.MediaTypeHeaderValue> System.Net.Http.Formatting.MediaTypeFormatter.get_SupportedMediaTypes()'.] …