C# log4net 2.0.8 nuget中缺少SmtpAppender？

我为.NETCore2.0创建了一个控制台应用程序，并安装了一个Log4Net2.0.8Nuget

我想使用SmtpAppender，但它在库中不存在

这是我的log4net配置

<?xml version="1.0" encoding="utf-8" ?>
<log4net>
   <appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">
    <to value="test@test.com" />
    <from value="test@test.com" />
    <subject type="log4net.Util.PatternString" value="Message logged" />
    <smtpHost value="localhost" />
    <authentication value="None" />
    <port value="25" />
    <bufferSize value="1" />
    <lossy value="false" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%utcdate [%level] - %message%newline%exception" />
    </layout>
  </appender>
  <root>
    <level value="All" />
    <appender-ref ref="SmtpAppender" />
  </root>
</log4net>

当我运行应用程序时，我希望向localhost发送一封带有消息“TEST INFO LOG”的电子邮件，但log4net将此消息输出到控制台：

log4net:ERROR Could not create Appender [SmtpAppender] of type [log4net.Appender.SmtpAppender]. Reported error follows.
System.TypeLoadException: Could not load type 'log4net.Appender.SmtpAppender' from assembly 'log4net, Version=2.0.8.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a'.
   at System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type, ObjectHandleOnStack keepAlive)
   at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)
   at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement appenderElement)
log4net:ERROR Appender named [SmtpAppender] not found.
Press any key to continue . . .

SmtpAppender类型甚至不显示在对象浏览器中。有SmtpPickupDirAppender，但这不是我想要使用的

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我错过什么了吗？经过一些搜索，我没有发现任何人有过这个问题，log4net 2.0.8已经有7个月了，下载了数百万次。

由于内置了SmtpAppender，您可以非常轻松地为log4net创建自己的自定义SMTP appender。看看

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作为如何构建非常基本的SMTP appender的示例。

类型应为

log4net.appender.SmtpAppender，log4net

，请尝试该操作。不，相同的错误。无法创建[log4net.Appender.SmtpAppender，log4net]类型的Appender[SmtpAppender]。存在，并且SmtpAppender不适用于.NET标准1.3-编辑：矩阵下方是.NET Core不支持的内容列表，SMTP Appender位于该列表中。

log4net:ERROR Could not create Appender [SmtpAppender] of type [log4net.Appender.SmtpAppender]. Reported error follows.
System.TypeLoadException: Could not load type 'log4net.Appender.SmtpAppender' from assembly 'log4net, Version=2.0.8.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a'.
   at System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type, ObjectHandleOnStack keepAlive)
   at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)
   at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement appenderElement)
log4net:ERROR Appender named [SmtpAppender] not found.
Press any key to continue . . .