server/src/Infrastructure.EntityFramework/Models/CollectionGroup.cs

using AutoMapper;

namespace Bit.Infrastructure.EntityFramework.Models
{
    public class CollectionGroup : Core.Entities.CollectionGroup
    {
        public virtual Collection Collection { get; set; }
        public virtual Group Group { get; set; }
    }

    public class CollectionGroupMapperProfile : Profile
    {
        public CollectionGroupMapperProfile()
        {
            CreateMap<Core.Entities.CollectionGroup, CollectionGroup>().ReverseMap();
        }
    }
}