Cannot consume scoped service 'MyDbContext' from singleton 'Microsoft.AspNetCore.Hosting.Internal.HostedServiceExecutor'

You need to inject IServiceScopeFactory to generate a scope. Otherwise you are not able to resolve scoped services in a singleton.

using (var scope = serviceScopeFactory.CreateScope())
{
  var context = scope.ServiceProvider.GetService<MyDbContext>();
}

Edit: It's perfectly fine to just inject IServiceProvider and do the following:

using (var scope = serviceProvider.CreateScope()) // this will use `IServiceScopeFactory` internally
{
  var context = scope.ServiceProvider.GetService<MyDbContext>();
}

The second way internally just resolves IServiceProviderScopeFactory and basically does the very same thing.

Though @peace answer worked for him, if you do have a DBContext in your IHostedService you need to use a IServiceScopeFactory.

To see an amazing example of how to do this check out this answer How should I inject a DbContext instance into an IHostedService?.

If you would like to read more about it from a blog, check this out .

I found the reason of an error. It was the CoordinatesHelper class, which is used in the the background task OnlineTaggerMS and is a Transient - so it resulted with an error. I have no idea why compilator kept throwing errors pointing at MyDbContext, keeping me off track for few hours.