Unity C# const与static readonly的区别与联系

 1 using System;
 2 
 3 namespace Test
 4 {
 5     class MainClass
 6     {
 7         //懒人写法的单例
 8         class Weapon
 9         {
10             public static readonly Weapon Instance;
11             static Weapon()
12             {
13                 Instance=new Weapon();
14             }
15         }
16         class MyWeapon
17         {
18             //static readonly和const的区别
19             public const int Speed=50;//const必须赋值，且只能用这种方法赋值
20             //static readonly 可以赋值也可以不赋值，也可以在用static修饰的构造方法中赋值
21             public static readonly int Speed_1;   
22             public static readonly int Speed_2=50;
23             public static readonly int Speed_3;
24             static MyWeapon()
25             {
26                 Speed_3=50;
27             }
28         }
29 
30         public static void Main (string[] args)
31         {
32             //static readonly和const的联系，
33             //在外边只能通过类名.访问，且在外部不能赋值（二者都是只读的）
34             Console.WriteLine (MyWeapon.Speed_3);//50
35         }
36     }
37 }