使用lambda表达式进行对象结合的筛选操作

 1 public class Person : BaseDomain
 2     {
 3         long _id;
 4         string firstName;
 5         string secondName;
 6         string comments;
 7 
 8         public Person()
 9         {}
10             
11         public Person(long id)
12         {
13             this._id = id;
14         }
15         public Person(long id,string firstName, string secondName)
16         {
17             this._id = id;
18             this.firstName = firstName;
19             this.secondName = secondName;
20             comments = String.Empty;
21         }
22         public Person(long id,string firstName, string secondName, string comments)
23             : this(id,firstName, secondName)
24         {
25             this.comments = comments;
26         }
27       
28         public string FirstName
29         {
30             get { return firstName; }
31             set { firstName = value; }
32         }
33         public string SecondName
34         {
35             get { return secondName; }
36             set { secondName = value; }
37         }
38         public string Comments
39         {
40             get { return comments; }
41             set { comments = value; }
42         }
43         public override string ToString()
44         {
45             return string.Format("FirstName: {0}\tSecondName: {1}\tComment: {2}", this.firstName, this.secondName, this.comments);
46         }
47     }

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