C# nlog事件上下文自定义变量日志错误

我使用Nlog进行了一个简单的设置，在传递消息等正常参数时工作正常，但在传递LogEventInfo对象时，如下所示：

//inside a class
private static Logger _logger = LogManager.GetLogger("MyLogs");

//in a method
LogEventInfo logEvent = new LogEventInfo(LogLevel.Info, "LogName", "some message");
logEvent.Properties.Add("httpMethod", "GET");
_logger.Warn(logEvent);

我收到以下错误：

[InvalidOperationException: Collection was modified; enumeration operation may not execute.]
System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) +52
System.Collections.Generic.Enumerator.MoveNext() +10900893
NLog.Targets.Target.MergeEventProperties(LogEventInfo logEvent) +312
NLog.Targets.Target.Write(AsyncLogEventInfo logEvent) +74

[NLogRuntimeException: Exception occurred in NLog]
NLog.<>c__DisplayClass1.<Write>b__0(Exception ex) +150
NLog.Internal.SingleCallContinuation.Function(Exception exception) +153
NLog.Targets.Target.Write(AsyncLogEventInfo logEvent) +189
NLog.Targets.Target.WriteAsyncLogEvent(AsyncLogEventInfo logEvent) +364
NLog.LoggerImpl.WriteToTargetWithFilterChain(TargetWithFilterChain targetListHead, LogEventInfo logEvent, AsyncContinuation onException) +341
NLog.LoggerImpl.Write(Type loggerType, TargetWithFilterChain targets, LogEventInfo logEvent, LogFactory factory) +351
NLog.Logger.WriteToTargets(LogLevel level, IFormatProvider formatProvider, T value) +136
NLog.Logger.Warn(T value) +106
proj.Infrastructure.Logging.LogResponse(String message, IOwinContext context, String flow, String action) in c:\Sites\proj\Infrastructure\Logging.cs:45
proj.<Validate>d__0.MoveNext() in c:\Sites\proj\myclass.cs:40
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
System.Runtime.CompilerServices.TaskAwaiter.GetResult() +21
Microsoft.Owin.Security.OAuth.<InvokeTokenEndpointAsync>d__1e.MoveNext() +1049
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
System.Runtime.CompilerServices.TaskAwaiter.GetResult() +21
Microsoft.Owin.Security.OAuth.<InvokeAsync>d__0.MoveNext() +1735
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() +24
Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +664
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +22
Microsoft.Owin.Host.SystemWeb.Infrastructure.ErrorState.Rethrow() +33
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult ar) +150
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork(IAsyncResult ar) +42
System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +415
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

[InvalidOperationException:集合已修改；枚举操作可能无法执行。]
System.ThrowHelper.ThrowInvalidOperationException（异常资源）+52
System.Collections.Generic.Enumerator.MoveNext（）+10900893
NLog.Targets.Target.MergeEventProperties（LogEventInfo logEvent）+312
NLog.Targets.Target.Write（AsyncLogEventInfo logEvent）+74
[NLogRuntimeException:NLog中发生异常]
NLog.c_uuu显示器Class1.b_uuu0（例外情况除外）+150
NLog.Internal.SingleCallContinuation.Function（异常）+153
NLog.Targets.Target.Write（AsyncLogEventInfo logEvent）+189
NLog.Targets.Target.WriteAsynClogeEvent（AsyncLogEventInfo logEvent）+364
NLog.LoggerImpl.WriteToTargetWithFilterChain（TargetWithFilterChain targetListHead，LogEventInfo logEvent，AsyncContinuation OneException）+341
NLog.LoggerImpl.Write（类型loggerType，TargetWithFilterChain目标，LogEventInfo logEvent，LogFactory工厂）+351
NLog.Logger.WriteToTargets（日志级别，IFormatProvider formatProvider，T值）+136
NLog.Logger.Warn（T值）+106
c:\Sites\proj\Infrastructure\Logging.cs:45中的proj.Infrastructure.Logging.LogResponse（字符串消息、IOwinContext上下文、字符串流、字符串操作）
c:\Sites\proj\myclass.cs中的proj.d\uu 0.MoveNext（）：40
System.Runtime.CompilerServices.TaskWaiter.ThrowForNonSuccess（任务任务）+93
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务）+52
System.Runtime.CompilerServices.TaskWaiter.GetResult（）+21
Microsoft.Owin.Security.OAuth.d_u1E.MoveNext（）+1049
System.Runtime.CompilerServices.TaskWaiter.ThrowForNonSuccess（任务任务）+93
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务）+52
System.Runtime.CompilerServices.TaskWaiter.GetResult（）+21
Microsoft.Owin.Security.OAuth.d_u0.MoveNext（）+1735
System.Runtime.CompilerServices.TaskWaiter.ThrowForNonSuccess（任务任务）+93
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务）+52
System.Runtime.CompilerServices.TaskWaiter`1.GetResult（）+24
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+664
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+22
Microsoft.Owin.Host.SystemWeb.Infrastructure.ErrorState.Rethrow（）+33
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End（IAsyncResult ar）+150
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork（IAsyncResult ar）+42
System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）+415
System.Web.HttpApplication.ExecuteStep（IExecutionStep步骤，布尔值&同步完成）+155

这是nlog配置文件：

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       internalLogFile="c:\log.txt" 
       internalLogLevel="Trace"
       throwExceptions="true">
   <targets>
     <target xsi:type="File" name="textFile"
          fileName="${basedir}/logs/${shortdate}/file.txt" layout="${message} ${event-context:item=httpMethod}"/>
   </targets>
   <rules>
     <logger name="*" minlevel="Trace" writeTo="textFile" />
   </rules>
</nlog>

我找过了，找不到任何相关的东西。我使用的nlog版本是：3.1.0.0

---

有人有什么想法吗？

在这种情况下，您应该使用

void Log（LogEventInfo logEvent）

方法

_logger.Log(logEvent);

资料来源：

但如果您想知道为什么会发生这种情况，可以通过链接：

---

是否每次尝试运行代码时都会发生此错误，并且

\u logger.Warn（logEvent）名为？@Pure.Krome Yeh是的。可能有拼写错误吗？您的布局有以下内容：
${event context:item=httpmethod}
。看起来你有一个额外的
m
@BrendanGreen，这只是在stackoverflow上格式化代码时的一个输入错误。这为我指明了正确的方向，奇怪的是你不能调用_logger.Warn/Info等，并且必须显式使用void Log，我认为以前的方法在日志级别方面会优先考虑