Service Fabric Service with HttpClient throws exception

Question

Whenever I call a method that creates new HttpClient(), i get and exception. No clue, as System.Net.Http is already referenced.

    public async Task<Stuff> GetOrder(int id)
    {

        var t = new HttpClient();
    }

    "InnerException": {
        "ClassName": "System.IO.FileNotFoundException",
        "Message": "Could not load file or assembly 'System.Net.Http, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.",

Any ideas?

Do read [this](https://aspnetmonsters.com/2016/08/2016-08-27-httpclientwrong/) — H H, Feb 15 '18 at 13:04
That 'specific version' demand is a little odd. Dis you set that on purpose? Why? — H H, Feb 15 '18 at 13:06
You can try removing the binding redirects, there is a similar question: https://stackoverflow.com/questions/47570912/strange-issue-with-system-net-http-4-2-0-0-not-found?answertab=votes#tab-top — Vivek Sharma, Feb 16 '18 at 12:53
I found this when doing clean/rebuild: (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(2041,5): warning MSB3277: Found conflicts between different versions of "System.Net.Http" that could not be resolved. These reference conflicts are listed in the build log when log verbosity is set to detailed. — ShaneKm, Feb 16 '18 at 15:10
Well, look int it with the package manager and/or remove and re-add the relevant assemblies. — H H, Feb 17 '18 at 13:20

score 0 · Accepted Answer · answered Feb 19 '18 at 08:56

The issue was caused by:

Microsoft.Extensions.Configuration.Abstractions

Whenever I had a reference to this assembly, it would throw this error. I needed this as I was using API config stuff. So the fix was to NOT let Resharper add reference to Http.Net but to have HttpClient referenced by NuGet.

<package id="System.Net.Http" version="4.3.3" targetFramework="net461" />

Service Fabric Service with HttpClient throws exception

1 Answers1