相关疑难解决方法(0)

System.Web.PreApplicationStartMethodAttribute定义为:

[AttributeUsage(AttributeTargets.Assembly, AllowMultiple=true)]
public sealed class PreApplicationStartMethodAttribute : Attribute 
{}

即它允许多次使用(AllowMultiple = true).但是如果我尝试将这个属性的几个用法添加到我的程序集中:

[assembly: PreApplicationStartMethod(typeof(MyType1), "Start")]
[assembly: PreApplicationStartMethod(typeof(MyType2), "Start")]

我收到编译器错误:

错误2重复'PreApplicationStartMethod'属性

为什么是这样？