trjhtr

I try learning about DDD architecture, I'm not sure if I correctly understand this idea.
I wrote some simple code in C#, maybe anybody can look for this, and give me some feedback, I would be very glad for any advice.
This is simple DDD without domain event, only Controler, DTO, Service and Domain with connect to DB using EF.
I don't know anybody who can tell me which is right.

Git repository

Can you tell me is this solution is good practise to write code like this:
Controller:

public class ItemController

 private readonly IItemService _itemService;

 public ItemController(IItemService itemService)
 
 _itemService = itemService;
 

 [HttpPost]
 [Route("add")]
 public ResponseDto<ItemDto> Add(ItemDto itemDto)
 
 return _itemService.Add(itemDto);
 

 [HttpGet]
 [Route("getAll")]
 public ResponseListDto<ItemDto> GetAll()
 
 return _itemService.GetAll();
 

Service:

public class ItemService : IItemService

 private readonly IRepository<Item> _repository;
 private readonly IMapper _mapper;

 public ItemService(IRepository<Item> repository, IMapper mapper)
 
 _repository = repository;
 _mapper = mapper;
 

 public ResponseDto<ItemDto> Add(ItemDto newItems)
 
 var response = new ResponseDto<ItemDto>();

 try
 
 var item = Item.Create(newItems.Name, newItems.Type, newItems.Price, newItems.Place);
 _repository.Add(item);
 _repository.Save();
 newItems.Id = item.Id;
 response.Result = newItems;
 
 catch (Exception ex)
 
 response.Error(ex);
 

 return response;
 

 public ResponseListDto<ItemDto> GetAll()
 
 var response = new ResponseListDto<ItemDto>();

 try
 
 response.Result = _repository.GetAll()
 .ToList()
 .Select(x => _mapper.Map<Item, ItemDto>(x))
 .ToList();
 
 catch (Exception ex)
 
 response.Error(ex);
 

 return response;
 

Item class - DB model

public class Item : IEntity

 public int Id get; set; 
 public string Name get; set; 
 public int Type get; set; 
 public decimal Price get; set; 
 public string Place get; set; 
 public IEnumerable<Reservation> Reservations get; set; 

 public static Item Create(string name, int type, decimal price, string place)
 
 Guard(name, type, price, place);

 var newItem = new Item
 
 Name = name,
 Place = place,
 Price = price,
 Type = type
 ;

 return newItem;
 

 #region Private

 private static void Guard(string name, int type, decimal price, string place)
 
 if (string.IsNullOrEmpty(name))
 throw new ArgumentNullException(nameof(name));

 if (type < 0)
 throw new ArgumentNullException(nameof(type));

 if (price <= 0)
 throw new ArgumentNullException(nameof(price));

 if (string.IsNullOrEmpty(place))
 throw new ArgumentNullException(nameof(place));
 

 #endregion Private

ItemDto

public class ItemDto

 public int Id get; set; 
 public string Name get; set; 
 public int Type get; set; 
 public decimal Price get; set; 
 public string Place get; set;