use stringlocalizer in automapper profile in csharp

In order to use the IStringLocalizer service in your AutoMapper profile, you can inject it into your profile constructor like this:

main.cs
using AutoMapper;
using Microsoft.Extensions.Localization;

public class MyProfile : Profile
{
    private readonly IStringLocalizer<MyProfile> _localizer;

    public MyProfile(IStringLocalizer<MyProfile> localizer)
    {
        _localizer = localizer;

        CreateMap<Foo, FooDto>()
            .ForMember(dest => dest.SomeProperty, opt => opt.MapFrom(src =>
                _localizer["MyLocalizedText", "Default text if localization fails"]));
    }
}
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In this example, I'm injecting the IStringLocalizer service into the profile constructor and storing it in a private field. Then, in the CreateMap method, I'm using the ForMember method to map the SomeProperty property of my FooDto to a localized string. The [] indexer of the _localizer object is used to retrieve the localized text, and the second parameter is the default text to use if the requested localization isn't found.

Make sure that you have setup localization correctly in your application, by configuring the supported cultures and local resource files.

Note: Please keep in mind that, injecting services directly into Profiles is not a recommended practice. Rather, you should map IStringLocalizer to a custom type and inject that type in your Profile.