错误：
System.AggregateException:“Some services are not able to be constructed (Error while validating the service descriptor ‘ServiceType: Microsoft.Extensions.Hosting.IHostedService Lifetime: Singleton ImplementationType: WebApplication9.Models.BgServerTest‘: Cannot consume scoped service ‘WebApplication9.Models.Imywork‘ from singleton ‘Microsoft.Extensions.Hosting.IHostedService‘.)”
InvalidOperationException: Cannot consume scoped service ‘WebApplication9.Models.Imywork‘ from singleton ‘Microsoft.Extensions.Hosting.IHostedService‘.
解决办法 ：
依赖注入时出错：Cannot consume scoped service 'xxx' from singleton 'yyy'
原文：https://www.cnblogs.com/lunawzh/p/15110389.html