GetOrderQueryHandler.cs

public class GetOrderQueryHandler : IRequestHandler<GetOrderQuery, OrderResponse>
{
    private readonly IGetOrderById _getOrderById;

    public GetOrderQueryHandler(IGetOrderById getOrderById)
    {
        _getOrderById = getOrderById;
    }
    
    public async Task<OrderResponse> Handle(GetOrderQuery request)
    {
        var orderResponse = await _getOrderById.ExecuteAsync(request.OrderId);
        return orderResponse;
    }
}