添加log4net配置时发生异常 [英] Exception when adding log4net config

问题描述

我在App.cs文件(正在创建一个只读变量)的第一行代码中遇到错误.我收到的错误是:

I am getting an error on the very first line of code in the App.cs file (which is creating a readonly variable). The error I am getting is:

"System.TypeInitializationException"类型的第一次机会异常 发生在PresentationFramework.dll中，类型的未处理异常 发生"System.TypeInitializationException" PresentationFramework.dll附加信息:类型初始化器 'System.Windows.Application'引发了异常.

A first chance exception of type 'System.TypeInitializationException' occurred in PresentationFramework.dll An unhandled exception of type 'System.TypeInitializationException' occurred in PresentationFramework.dll Additional information: The type initializer for 'System.Windows.Application' threw an exception.

这是我在VS中看到的消息弹出窗口:

This is the message popup I get in VS:

类型为'System.TypeInitializationException'的未处理异常 在PresentationFramework.dll中发生

An unhandled exception of type 'System.TypeInitializationException' occurred in PresentationFramework.dll

其他信息:的类型初始值设定项 "System.Windows.Application"抛出异常.

Additional information: The type initializer for 'System.Windows.Application' threw an exception.

我所做的唯一更改就是将其添加到我的app.config中:

The only change I have made is adding this to my app.config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <startup> 
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1"/>
  </startup>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>
  <log4net>
    <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender" >
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%ndc] - %message%newline" />
      </layout>
    </appender>
    <root>
      <level value="INFO" />
      <appender-ref ref="ConsoleAppender" />
    </root>
  </log4net>
</configuration>

推荐答案

问题是我在文件app.config的开头而不是结尾处有<startup> xml节点.它必须是app.config文件中的最后一件事.

The issue was that I had the <startup> xml node in the app.config file at the start rather than the end of the file. It needs to be the last thing in the app.config file.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  // lots of other stuff here...
  <startup> 
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1"/>
  </startup>
</configuration>

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