Trying to add AutoMapper to Asp.net Core 2?

Question

I worked on a asp.net core 1.1 project a while ago and use in projetc AutoMapper.

in asp.net core 1.1, I add services.AddAutoMapper() in startup file :<

Answer 1

You likely updated your ASP.NET Core dependencies, but still using outdated AutoMapper.Extensions.Microsoft.DependencyInjection package.

For ASP.NET Core you need at least Version 3.0.1 from https://www.nuget.org/packages/AutoMapper.Extensions.Microsoft.DependencyInjection/3.0.1

Which references AutoMapper 6.1.1 or higher.

AutoMapper (>= 6.1.1)

Microsoft.Extensions.DependencyInjection.Abstractions (>= 2.0.0)

Microsoft.Extensions.DependencyModel (>= 2.0.0)

The older packages depend on Microsoft.Extensions.DependencyInjection.Abstractions 1.1.0 and can't be used with ASP.NET Core since there have been breaking changes between Microsoft.Extensions.DependencyInjection.Abstractions 1.1.0 and 2.0