Difference between IMapper and IMappingEngine in Automapper

Question

I am using IMapper which is configured as follows:

var mapperConfig = new MapperConfiguration(cfg => {
      cfg.CreateMap<IAitoeRedCell, VigilantSingleProcessViewModel>();
      cfg.CreateMap<MailSettingsViewModel1, IEmail>();
    });

NInjectKernel.Bind<IMapper>().ToConstant(mapperConfig.CreateMapper());

And this is injected into as follows.

public MailSettingsViewModel(IEmailService emailService, IMapper mapper) {...}

But now for unit tests I see on the net that pple are refering to IMappingEngine.

I have a few questions.

1. What is the namespace of IMappingEngine?

   I checked out the following namespaces, but I did not find it.

   using AutoMapper;
   using AutoMapper.Configuration;
   using AutoMapper.Configuration.Conventions;
   using AutoMapper.Execution;
   using AutoMapper.Mappers;
   using AutoMapper.QueryableExtensions;
   using AutoMapper.QueryableExtensions.Impl;
   

   Am I missing some other nuget package? I found only one - AutoMapper :(

2. More importantly I want to know differences and which to use when? Can someone please share links with some simple code samples.

Answer 1

I also spent time on this. The following link helped me to use IMapper instead of IMappingEngine.

IMappingEngine not recognized in AutoMapper 5.1.1