AutoMapper

1- Install-Package AutoMapper 2- in nuget pachage

automapper.extensions.microsoft.dependencyinjection

in service :

in .net 5 or lower : services.AddAutoMapper(typeof(Startup));

in .net 6 builder.Services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());

in new class :

public class CategoryProfile: Profile {

public CategoryProfile() {

    CreateMap<Employee, EmployDTO>().ReverseMap();
    CreateMap<CategoryDto, Category>().ForMember(dest => dest.CategoryName, opt => opt.MapFrom(src => src.Name)).ForMember(dest => dest.CategoryId, opt => opt.Ignore());
    CreateMap<Category, CategoryDto>().ForMember(dest => dest.Name, opt => opt.MapFrom(src => src.CategoryName));
    
}

}

in class

private readonly IMapper _mapper;

public WeatherForecastController(IMapper mapper)
    {
        _mapper = mapper;
    }
    
var result = _mapper.Map<DTO>(Entiry);