Method not found: 'Microsoft.Extensions.DependencyInjection.ServiceProvider'

Question

I have developed a simple console application in .NET6 with target Platform x86 which contains 1 project only with the following packages:

Microsoft.AspNetCore.SignalR.Client (6.0.5)

Microsoft.AspNetCore.SignalR.Common(6.0.5)

Microsoft.AspNetCore.SignalR.Core(1.1.0)

System.IO.Ports (6.0.0)

Also it contains an API to communicate with a Dispenser.

This console application send and recieve data with main software throught SignalR and send and recieve data with Dispenser throught API.

I don't use any dependency injection and the Dispenser response when I try to initialize it is the next one:

Método no encontrado: 'Microsoft.Extensions.DependencyInjection.ServiceProvider Microsoft.Extensions.DependencyInjection.ServiceCollectionContainerBuilderExtensions.BuildServiceProvider(Microsoft.Extensions.DependencyInjection.IServiceCollection)'.

Any idea why the response is that?

Looks like it is missing a library. Try to install Microsoft.Extensions.DependencyInjection.ServiceProvider in the project from nuget. — user11066039
– user11066039, Commented Jun 10, 2022 at 6:58
@JesusHedo Try to turn off compiler optimizations, open project properties, then go to "Build - General". There are options to enable/disable compiler optimizations under title "Optimize code". — Rafael
– Rafael, Commented Jun 10, 2022 at 7:14
Please share the code using signalr especially the line throwing the exception. — Guru Stron
– Guru Stron, Commented Jun 10, 2022 at 7:20
@JHBonarius I would guess that connecting to server would not require all of ASP.NET Core as a dependency. — Guru Stron
– Guru Stron, Commented Jun 10, 2022 at 7:22

Guru Stron · Accepted Answer · 2022-06-10 07:39:34Z

1

Microsoft.AspNetCore.SignalR.Core seems to be a legacy package (last updated in 2018) and was build against Microsoft.Extensions.DependencyInjection.Abstractions (>= 2.2.0), while Microsoft.AspNetCore.SignalR.Client is transitively using Microsoft.Extensions.DependencyInjection.Abstractions (>= 6.0.0) so the later version should be resolved during build. And it definitely has some breaking changes (like removal or signature changes of ServiceCollectionContainerBuilderExtensions.BuildServiceProvider(IServiceCollection) method)

Try removing Microsoft.AspNetCore.SignalR.Core package, Microsoft.AspNetCore.SignalR.Client should be sufficient enough to connect to the SingnalR server.

edited Jun 10, 2022 at 7:39

answered Jun 10, 2022 at 7:14

Guru Stron

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5 Comments

Guru Stron Over a year ago

@JHBonarius the problem clearly comes from Microsoft.AspNetCore.SignalR.Core which seems to be a legacy package which should not be used. Also you can create clients without DI.

JHBonarius Over a year ago

Aha, I learned something today. I think that link is the answer. Follow that guide (and don't install other random packages)

Jesus Hedo Over a year ago

But my console application is a server too, also manage requests

Guru Stron Over a year ago

@JesusHedo AFAIK you need web application to host SignalR.

Guru Stron Over a year ago

@JesusHedo also see this answer.

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