Demo/Data/Repository/GroupRepositoryImpl.cs

using Demo.Domain.Models;

using Demo.Data.LocalData;

namespace Demo.Data.Repository
{
    public class GroupRepositoryImpl
    {
        // public List<GroupLocalEntity> GetAllGroups() => LocalStaticData.groups;
        public GroupRepositoryImpl() {

            GetAllGroups = LocalStaticData.groups;
        }
        public List<GroupLocalEntity> GetAllGroups
        { get; set; }

        public void CreateNewGroup(GroupLocalEntity groupLocalEntity)
        {
            GetAllGroups.Add(groupLocalEntity);
        }

        public GroupLocalEntity? UpdateGroup(GroupLocalEntity groupUpdateLocalEntity)
        {
            int index = GetAllGroups.FindIndex(x => x.ID == groupUpdateLocalEntity.ID);
            if (index == -1) return null;
            GetAllGroups[index].Name = groupUpdateLocalEntity.Name;
            Console.WriteLine($"Обновленный Name: {GetAllGroups[index].Name}");
            return GetAllGroups[index];
        }
    }
}