Conditional特性

#define DoTrace//这里定义了标注符号，注释掉该行，那么标注有 [Conditional("DoTrace")]特性的方法将不执行

using System;

using System.Diagnostics;

namespace ExofConditional

{

class Program

{

[Conditional("DoTrace")]

static void TraceMessage(string str)

{

Console.WriteLine(str);

}

static void Main(string[] args)

{

TraceMessage("Start of Main");

Console.WriteLine("doing Main ...");

TraceMessage("End of Main");

Console.ReadKey();

}

}

}