1     class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             
 6             string[] names = { "Burke", "Connor", "Frank", "Everett", "Albert", "George", "Harris", "David" };
 7 
 8 
 9             //為擴充套件方法傳Lambda 做引數，lambda表示式會被轉化成匿名方法，匿名方法會轉化成委託。注意，我們這裡的擴充套件方法要求的引數是委託型別的例項
 

10             IEnumerable<string> myQuery =
11                 names.Where(s => s.Length == 5)
12                 .OrderBy(s => s)
13                 .Select(s => s.ToLower());
14 
15 
16             foreach (string item in myQuery)
17             {
18                 Console.WriteLine(item);
 
19             }
20 
21         }
22 
23     }