The System.InvalidOperationException with the message “Cannot create an instance of abstract class” occurs in .NET when you attempt to instantiate an abstract class directly. Abstract classes cannot be instantiated because….
The error “Microsoft.Extensions.DependencyInjection.Abstractions.ServiceProvider – Unable to resolve service” occurs in .NET applications when the dependency injection (DI) container is unable to resolve a service that is requested. This typically happens….
The Microsoft.Extensions.Options.OptionsValidationException with the message “Configuration options validation failed” occurs in .NET applications when the validation of configuration options fails. This typically happens when using the IOptions<T>, IOptionsSnapshot<T>, or IOptionsMonitor<T>….
