command.cs

//Command Model

public class CreateCustomerCommandHandler : IRequestHandler<CreateCustomerCommand, Customer>
{
    private readonly ICustomerRepository _customerRepository;

    public CreateCustomerCommandHandler(ICustomerRepository customerRepository)
    {
        _customerRepository = customerRepository;
    }

    public async Task<Customer> Handle(CreateCustomerCommand request, CancellationToken cancellationToken)
    {
        return await _customerRepository.AddAsync(request.Customer);
    }
}