Cannot consume scoped service IMongoDbContext from singleton IActiveUsersService after upgrade to ASP.NET Core 2.0

Question

I updated a project to ASP.NET Core 2 today and I get the following error:

Cannot consume scoped service IMongoDbContext from singleton IActiveUsersSe

Answer 1

You can also add

.UseDefaultServiceProvider(options =>
                    options.ValidateScopes = false)

before .Build() in Program.cs file to disable the validation.

Try this only for development testing, ActiveUsersService is singleton and has a larger lifetime than MongoDbContext which is scoped and will not get disposed.