萧瑟流光,纪念币,3800
对于Action的使用方法使用如下:
namespace ConsoleApp1 { class Program { static void Main(string[] args) { string first = "First"; var action = new Action(() => { Console.WriteLine(first); }); action(); var action2 = new Action<string>((s) => { Console.WriteLine($"Action<T>:{s}"); }); action2(first); var action3 = new Action<string, string>((s1, s2) => { Console.WriteLine($"Action<T1,T2>:{s1},{s2}"); }); action3(first, "second"); } } }
使用dotPeek通过反编译,得到代码:
namespace ConsoleApp1 { internal class Program { private static void Main(string[] args) { string first = "First"; ((Action) (() => Console.WriteLine(first)))(); ((Action<string>) (s => Console.WriteLine(string.Format("Action<T>:{0}", (object) s))))(first); ((Action<string, string>) ((s1, s2) => Console.WriteLine(string.Format("Action<T1,T2>:{0},{1}", (object) s1, (object) s2))))(first, "second"); } } }
下面写一种与反编译出来的相似的方法
namespace ConsoleApp1 { class Program { static void Main(string[] args) { string first = "First"; var action = new Action(() => { Console.WriteLine(first); }); action(); var action2 = new Action<string>((s) => { Console.WriteLine($"Action<T>:{s}"); }); action2(first); var action3 = new Action<string, string>((s1, s2) => { Console.WriteLine($"Action<T1,T2>:{s1},{s2}"); }); action3(first, "second"); new Action(() => { Console.WriteLine(first); })(); new Action<string>((s) => { Console.WriteLine($"Action<T>:{s}"); })(first); new Action<string, string>((s1, s2) => { Console.WriteLine($"Action<T1,T2>:{s1},{s2}"); })(first, "second"); } } }
看一下反编译的结果:
namespace ConsoleApp1 { internal class Program { private static void Main(string[] args) { string first = "First"; ((Action) (() => Console.WriteLine(first)))(); ((Action<string>) (s => Console.WriteLine(string.Format("Action<T>:{0}", (object) s))))(first); ((Action<string, string>) ((s1, s2) => Console.WriteLine(string.Format("Action<T1,T2>:{0},{1}", (object) s1, (object) s2))))(first, "second"); ((Action) (() => Console.WriteLine(first)))(); string str1 = first; ((Action<string>) (s => Console.WriteLine(string.Format("Action<T>:{0}", (object) s))))(str1); string str2 = first; string str3 = "second"; ((Action<string, string>) ((s1, s2) => Console.WriteLine(string.Format("Action<T1,T2>:{0},{1}", (object) s1, (object) s2))))(str2, str3); } } }
反编译结果是帮我们定义了几个变量。
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