C# 链表去重 List 一维 二维 分别使用 Distinct() GroupBy() 方法

 1         class ClassA
 2         {
 3             private int a;
 4             public int A
 5             {
 6                 get { return a; }
 7                 set { a = value; }
 8 
 9             }
10 
11             private string b;
12             public string B
13             {
14                 get { return b; }
15                 set { b = value; }
16 
17             }
18         }

 1 static void Main(string[] args)
 2         {
 3             //1.一维链表去重复（Distinct方法）
 4             List<string> lst1 = new List<string>() { "aa", "bb", "cc", "aa", "bb" };
 5             List<string> lst1Distinct = lst1.Distinct().ToList();
 6 
 7             StringBuilder sb1 = new StringBuilder();
 8             sb1.Append("一维链表去重:");
 9             foreach (var item in lst1Distinct) 
10             {
11                 sb1.Append(item);
12                 sb1.Append("-");
13             }
14             Console.WriteLine(sb1.ToString());//结果为 aa-bb-cc-
15 
16             //2.二维链表去重（GroupBy方法）
17             List<ClassA> lst2 = new List<ClassA>();
18             lst2.Add(new ClassA() { A = 1, B = "aa" });
19             lst2.Add(new ClassA() { A = 1, B = "bb" });
20             lst2.Add(new ClassA() { A = 2, B = "aa" });
21             lst2.Add(new ClassA() { A = 3, B = "aa" });
22             lst2.Add(new ClassA() { A = 1, B = "cc" });
23             var lst2Distinct = lst2.GroupBy(r => r.A);//根据属性A分组
24             StringBuilder sb2 = new StringBuilder();
25             sb2.Append("二维链表去重：");
26             foreach (var item in lst2Distinct)
27             {
28                 sb2.Append(item.Key.ToString());
29                 sb2.Append("-");
30             }
31             Console.WriteLine(sb2.ToString());//结果为1-2-3-
32             Console.Read();
33         }