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I have an issue when I try to build connection for SignalR hub from VSIX project.

Visual studio 2022

VSIX project: TargetFramework: .Net framework 4.7.2

Signal R lib Lib name: Microsoft.AspNetCore.SignalR.Client version: 7.0.5

// MyCoolCommand.cs

/// <summary>
/// Command handler
/// </summary>
internal sealed class MyCoolCommand
{
   // some init code. I did change nothing
   private void Execute(object sender, EventArgs e)
   {
      var url = "http://localhost:9200/myHub";

      // will fail
      var connection = new HubConnectionBuilder()
         .WithUrl(url)
         .WithAutomaticReconnect()
         .Build();
    }
}

Exception info:

System.IO.FileNotFoundException: 'Could not load file or assembly 'Microsoft.Extensions.Options, Version=7.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' or one of its dependencies. The system cannot find the file specified.'

How to repeat in your local machine:

  1. create VSIX project

  2. add command

  3. add Microsoft.AspNetCore.SignalR.Client from nuger

  4. in your command copy code from this example

  5. run

  6. I tried to change .net framework version - didn't helped

  7. Microsoft.Extensions.Options is one of sub deps for 'Microsoft.AspNetCore.SignalR.Client'. I double checked and this lib is exist in the output after build.

  8. I also tried to add Microsoft.Extensions.Options manually to the place where devenv.exe lives. after this I started to see the same exception but in this time System.Runtime is missing.

I think it somehow releated with runtime.

Чингиз Олжабаев
  • 11
  • 2

2 Answers2

0

You are mixing .NET Framework and .NET CORE libraries that are not compatible with each other.

This link explains the differences between the two.

Follow the documentation for using .NET Framework version. Here is the repo as well - https://github.com/SignalR/SignalR

Frank M
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  • Hello, thank you for your comment. I've just checked and the lib should work with dotnet framework as well. You can also check it in avaliable frameworks. Additionally I created .net framework 4.7.2 console application and added the lib. It works smoothly. So I belieive that this is not a case. – Чингиз Олжабаев Jun 09 '23 at 17:43
0

Answer: In my case changing the version of signal r client helped. From 7.0.5 to 7.0.0.

Maybe it somehow related with avaliable runtime on your machine.

Чингиз Олжабаев
  • 11
  • 2