本文介绍了为什么不编译多次使用PreApplicationStartMethodAttribute?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
System.Web.PreApplicationStartMethodAttribute定义为:
System.Web.PreApplicationStartMethodAttribute defined as:
[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种用法添加到我的程序集中:
I.e. it allows multiple usage (AllowMultiple=true).But if I try to added several usages of this attribute to my assembly :
[assembly: PreApplicationStartMethod(typeof(MyType1), "Start")]
[assembly: PreApplicationStartMethod(typeof(MyType2), "Start")]
我收到编译器错误:
这是为什么?
推荐答案
我怀疑您正在查看,该文件记录为具有AllowMultiple = True
.
I suspect you were looking at the .NET 4.5 version, which is documented as having AllowMultiple = True
.
.NET 4.0版本的文档将其显示为:
The documentation for the .NET 4.0 version shows it as AllowMultiple = false
:
[AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple = false)]
public sealed class PreApplicationStartMethodAttribute : Attribute
因此,如果您以.NET 4.5为目标,那应该没问题.
So if you target .NET 4.5, it should be okay.
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