Mapper does not contain a definition for Initialize AutoMapper C#

Question

I have implement Auto Mapper in my asp.net C# project but i got the error:

Mapper does not contain a definition for Initialize

I've tried this example Link Here

I've paste my code:

namespace NewsWeb.Web.Infrastructure
{
    public class AutomapperWebProfile:Profile
    {
        public AutomapperWebProfile()
        {
            CreateMap<DistrictDTO, District>().ReverseMap();
        }

        public static void Run()
        {
            Mapper.Initialize(a =>
            {
                a.AddProfile<AutomapperWebProfile>();
            });
        }
    }
}

In my Golbal.asax.cs file:

 AutomapperWebProfile.Run();

Error image:

Answer 1

Method Mapper.Initialize is obsolete since version v9.0.0 (doc), you need to use MapperConfiguration instead (doc).

var config = new MapperConfiguration(cfg => {
    cfg.AddProfile<AutomapperWebProfile>();
});

var mapper = config.CreateMapper();
// or
var mapper = new Mapper(config);

Initializing a mapper with a static method in a Golbal.asax is not a flexible solution. I would suggest creating a config directly in the custom mapper class.

public interface IFooMapper 
{   
    Foo Map(Bar bar); 
}

public class FooMapper : IFooMapper
{
    private readonly IMapper mapper;

    public FooMapper()
    {
        var config = new MapperConfiguration(cfg =>
        {
            cfg.AddProfile<FooProfile>();
        });

        mapper = config.CreateMapper();
    }

    public Foo Map(Bar bar) => mapper.Map<Foo>(bar);
}