[C#]扩展方法

 1 using System;
 2 using UnityEngine;
 3 
 4 public static class StringExtension
 5 {
 6     public static string TestRepeat(this String str, int repeatCount)
 7     {
 8         string tempStr = str;
 9         for (int i = 0; i < repeatCount; i++)
10         {
11             tempStr = tempStr + str;
12         }
13         return tempStr;
14     }
15 }
16 
17 public class TestExtensionMethod : MonoBehaviour {
18 
19     void Start ()
20     {
21         string s = "hi";
22         string s2 = s.TestRepeat(2);
23         print(s2);//输出：hihihi
24     }
25 }