c# - Log4Net : Error creating the web proxy specified in the 'system.net/defaultproxy' configuration section -

i have strange error :

in web config have :

<system.diagnostics>     <trace autoflush="true">       <listeners>         <add name="textwritertracelistener" type="system.diagnostics.textwritertracelistener" initializedata="c:\tmp\log4net.txt" />       </listeners>     </trace> 

so when try connect www.google.com (for example) code. have error :

error creating web proxy specified in 'system.net/defaultproxy' configuration section 

if remove tmp path have :

<system.diagnostics>     <trace autoflush="true">       <listeners>         <add name="textwritertracelistener" type="system.diagnostics.textwritertracelistener" initializedata="c:\log4net.txt" />       </listeners>     </trace> 

all works fine.

strange isn't ?

someone has idea ?

i found,

i think it's bug in iis.

the problem have website hosted on iis, in website, have application webservices.

my website , webservices have own web.config.

but listener name same on 2 web.config, when value different, had problem above.

so fix change name of listener :

<system.diagnostics>     <trace autoflush="true">       <listeners>         <add name="textwritertracelistener2" type="system.diagnostics.textwritertracelistener" initializedata="c:\tmp\log4net.txt" />       </listeners>     </trace> 

name="textwritertracelistener2" webservice , name="textwritertracelistener" website.

but better separate them on iis (i later) thanks, help.