问题
I have an Asp.net WebApi 2 site referencing .net 4.6.1. Up till now the site was referencing a PCL assembly (portable class library), for compatibility with UWP & Xamarin, without issues. Now I am trying to change that PCL to a NetStandard2.0 assembly, as recommended, but am receiving an error at site start up.
The error is below -
Method not found: 'System.Collections.ObjectModel.Collection`1 System.Web.Http.HttpConfiguration.get_MessageHandlers()'.
Any ideas? Thanks
回答1:
I was getting the same thing. I added this to my web.config and it worked.
<dependentAssembly>
<assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-4.2.0.0" newVersion="4.2.0.0" />
</dependentAssembly>
Oh the joys of Binding Redirects.
来源：https://stackoverflow.com/questions/45720729/web-api-2-run-time-error-when-trying-to-use-netstandard-2-assembly