1  using System;
 2  using System.Linq;
 3  using System.Threading.Tasks;
 4  
 5  namespace PingUp.Data
 6  {
 7      public class WeatherForecastService
 8      {
 9          private static readonly string[] Summaries = new[]
10          {
11              "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
12          };
13  
14          public Task<WeatherForecast[]> GetForecastAsync(DateTime startDate)
15          {
16              var rng = new Random();
17              return Task.FromResult(Enumerable.Range(1, 5).Select(index => new WeatherForecast
18              {
19                  Date = startDate.AddDays(index),
20                  TemperatureC = rng.Next(-20, 55),
21                  Summary = Summaries[rng.Next(Summaries.Length)]
22              }).ToArray());
23          }
24      }
25  }