c# 根据时区计算时间

根据城市所在世界计算该城市当前时间

并处理了某些城市夏令时问题

 1  private DateTime GetDatetime(TimeZoneEntity timeZone)
 2         {
 3             try
 4             {
 5                 DateTime date = DateTime.Now.ToUniversalTime();
 6                 date = date.AddHours(timeZone.TimeZone);
 7                 //判断城市是否启用夏令时，如果启用需要+1小时
 8                 var list = TimeZoneInfo.GetSystemTimeZones();
 9                 foreach (var info in list)
10                 {
11                     Console.WriteLine("UTC offset:{0}", info.BaseUtcOffset);
12                     if (timeZone.TimeZone == info.BaseUtcOffset.Hours)
13                     {
14                         //Console.WriteLine("find :" + info.DisplayName);
15                         if (info.DisplayName.ToString().Contains(timeZone.CityName))
16                         {
17                             if (info.IsDaylightSavingTime(DateTime.Now))
18                             {
19                                 date = date.AddHours(1);
20                             }
22                         }
23                     }
24                 }
25                 return date;
26             }
27             catch (Exception)
28             {
29                 throw;
30             }
31         }
32 
33 
34  public class TimeZoneEntity
35     {
36         public int Id { get; set; }
37         public string CountryName { get; set; }
38         public string CityNameEN { get; set; }
39         public string CityName { get; set; }
40         public int TimeZone { get; set; }
41     }