Update

src/BackOffice.BFF.Application/UserAddressCQ/Commands/CreateNewUserAddress/CreateNewUserAddressCommand.cs

@@ -0,0 +1,17 @@
+namespace BackOffice.BFF.Application.UserAddressCQ.Commands.CreateNewUserAddress;
+public record CreateNewUserAddressCommand : IRequest<CreateNewUserAddressResponseDto>
+{
+    //شناسه کاربر 
+    public long UserId { get; init; }
+    //عنوان 
+    public string Title { get; init; }
+    //آدرس 
+    public string Address { get; init; }
+    //کدپستی 
+    public string PostalCode { get; init; }
+    //پیشفرض؟ 
+    public bool IsDefault { get; init; }
+    //شناسه شهر 
+    public long CityId { get; init; }
+
+}

src/BackOffice.BFF.Application/UserAddressCQ/Commands/CreateNewUserAddress/CreateNewUserAddressCommandHandler.cs

@@ -0,0 +1,16 @@
+namespace BackOffice.BFF.Application.UserAddressCQ.Commands.CreateNewUserAddress;
+public class CreateNewUserAddressCommandHandler : IRequestHandler<CreateNewUserAddressCommand, CreateNewUserAddressResponseDto>
+{
+    private readonly IApplicationContractContext _context;
+
+    public CreateNewUserAddressCommandHandler(IApplicationContractContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<CreateNewUserAddressResponseDto> Handle(CreateNewUserAddressCommand request, CancellationToken cancellationToken)
+    {
+        //TODO: Implement your business logic
+        return new CreateNewUserAddressResponseDto();
+    }
+}

src/BackOffice.BFF.Application/UserAddressCQ/Commands/CreateNewUserAddress/CreateNewUserAddressCommandValidator.cs

@@ -0,0 +1,26 @@
+namespace BackOffice.BFF.Application.UserAddressCQ.Commands.CreateNewUserAddress;
+public class CreateNewUserAddressCommandValidator : AbstractValidator<CreateNewUserAddressCommand>
+{
+    public CreateNewUserAddressCommandValidator()
+    {
+        RuleFor(model => model.UserId)
+            .NotNull();
+        RuleFor(model => model.Title)
+            .NotEmpty();
+        RuleFor(model => model.Address)
+            .NotEmpty();
+        RuleFor(model => model.PostalCode)
+            .NotEmpty();
+        RuleFor(model => model.IsDefault)
+            .NotNull();
+        RuleFor(model => model.CityId)
+            .NotNull();
+    }
+    public Func<object, string, Task<IEnumerable<string>>> ValidateValue => async (model, propertyName) =>
+    {
+        var result = await ValidateAsync(ValidationContext<CreateNewUserAddressCommand>.CreateWithOptions((CreateNewUserAddressCommand)model, x => x.IncludeProperties(propertyName)));
+        if (result.IsValid)
+            return Array.Empty<string>();
+        return result.Errors.Select(e => e.ErrorMessage);
+    };
+}

src/BackOffice.BFF.Application/UserAddressCQ/Commands/CreateNewUserAddress/CreateNewUserAddressResponseDto.cs

@@ -0,0 +1,7 @@
+namespace BackOffice.BFF.Application.UserAddressCQ.Commands.CreateNewUserAddress;
+public class CreateNewUserAddressResponseDto
+{
+    //شناسه 
+    public long Id { get; set; }
+
+}