```cs using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { Console.WriteLine("1380094216 = {0}", new DateTime(((long)(1380094216) * (long)(10000000)), DateTimeKind.Utc).ToLocalTime().AddYears(1969)); Console.WriteLine(Convert.ToDateTime("1970-1-1 00:00:00").Ticks / 10000000);//Ticks为百纳秒数,Sticks/10000000是毫秒数 var list = Enumerable.Range(1, 7); foreach (var item in list) { Console.Write("{0}\t", item); } var arr = list.ToArray(); var result = new int[6]; for (int i = 0; i < result.Length; i++) { result[i] = new Random(i).Next(1, 7); } Console.WriteLine("\n-------------------------------"); for (int i = 0; i < result.Length; i++) { Console.Write("{0}\t", result[i]); } Console.WriteLine("\n-------------------------------"); var query = Enumerable.Range(1, 7).OrderBy(x => Guid.NewGuid()); var seq = Enumerable.Range(1, 7).OrderBy(x => Guid.NewGuid()).Take(6); foreach (var item in seq) { Console.Write("{0}\t", item); } Console.WriteLine("\n-------------------------------"); var query2 = from x in arr from y in arr where y > x select string.Format("{0}{1}", x, y); foreach (string item in query2) { Console.WriteLine(item); } Console.WriteLine("\n-------------------------------"); var query3 = from x in arr from y in arr where y < x select string.Format("{0}{1}", x, y); foreach (string item in query3) { Console.WriteLine(item); } Console.ReadKey(true); } } } ```