DependencyResolver.cs

Public static class DependencyResolver 
{
    Private static IServiceProvider _customServiceProvider;
    Private static IServiceProvider _defaultServiceProvider;

    Public static void SetResolver(IServiceProvider)

    Internal static GetService(Type)
    (
        Var service = _currentServiceProvider.GetService(type);

        If (service != null)
        {
            Return service;
        }

        Service = _defaultServiceProvider.GetService(type);

        If (service != null)
        {
            Return service;
        }

        Service = Activator.CreateInstance(type);

        If (service != null)
        {
            Return service;
        }

        Throw new CannotFindService(type);