[C#6] 6-表达式形式的成员函数

 1 internal class Person
 2 {
 3     public string FirstName { get; set; }
 4     public string LastName { get; set; }
 5 
 6     public string FullName
 7     {
 8         get { return FirstName + LastName; }
 9     }
10 
11     public override string ToString()
12     {
13         return string.Format("[firstname={0},lastname={1}]", FirstName, LastName);
14     }
15 }

1 internal class Person
2 {
3     public string FirstName { get; set; }
4     public string LastName { get; set; }
5 
6     public string FullName => FirstName + LastName;
7 
8     public override string ToString() => string.Format("[firstname={0},lastname={1}]", FirstName, LastName);
9 }

 1 internal class Point
 2 {
 3     public int X { get; private set; }
 4     public int Y { get; private set; }
 5 
 6     public Point(int x, int y)
 7     {
 8         this.X = x;
 9         this.Y = y;
10     }
11 
12     public Point Add(Point other)
13     {
14         return new Point(this.X + other.X, this.Y + other.Y);
15     }
16 
17     //方法1，有返回值
18     public Point Move(int dx, int dy) => new Point(X + dx, Y + dy);
19 
20     //方法2，无返回值
21     public void Print() => Console.WriteLine(X + "," + Y);
22 
23     //静态方法，操作符重载
24     public static Point operator +(Point a, Point b) => a.Add(b);
25 
26     //只读属性，只能用于只读属性
27     public string Display => "[" + X + "," + Y + "]";
28 
29     //索引器
30     public int this[long id] => 1;
31 }
32 
33 internal class Program
34 {
35     private static void Main()
36     {
37         Point p1 = new Point(1, 1);
38         Point p2 = new Point(2, 3);
39         Point p3 = p1 + p2;
40         //输出:[3,4]
41         Console.WriteLine(p3.Display);
42     }
43 }