TextWriterTrace Listener in app.config executing over a NetworkShare causes FileIOPermissio n exception

[Ant Corrie]

I am at a loss as to why this is not working. I am trying to setup a
TextWriterTrace Listener in my application config file and then execute the
app from the network. I get a security exception (listed below) even though
I have StrongNamed my application and used the .NET Configuration Tool to
create a Code Access Group in the Machine Policy that gives FullTrust to
assemblies with the StrongName that I created.

If you uncomment the code in Main and remove the <system.diagnos tics> from
the app.config it will run without error.

Why?

I did a "net use Y: \\computer\shar e" to setup my execution location.

I am wondering if this is just a bug with .NET or I need to find the magic
setting somewhere to get things to work...

Please help.

TextWriterNetwo rk.cs
<============== =============== =============== =============== =============== =

using System;
using System.Diagnost ics;
using System.Security .Permissions;
using System.Reflecti on;
using System.Runtime. CompilerService s;

[assembly:FileIO PermissionAttri bute(SecurityAc tion.RequestMin imum,
All="Y:\\Test\\ MyListener.log" )]
[assembly: AssemblyVersion ("1.0.0.0")]
[assembly: AssemblyKeyFile (@"..\..\TextWr iter.snk")]

namespace TextWriterNetwo rk
{
class Class1
{
[STAThread]
[FileIOPermissio nAttribute(Secu rityAction.Dema nd, Unrestricted=tr ue)]
static void Main(string[] args)
{
//TextWriterTrace Listener test =
// new TextWriterTrace Listener(@"Y:\T est\MyLIstener. log");
//Trace.Listeners .Add(test);
Trace.WriteLine ("This is a test");
Trace.Flush();
Console.ReadLin e();
}
}
}
<============== =============== =============== =============== =============== =
app.config
<============== =============== =============== =============== =============== = <?xml version="1.0"?>
<configuratio n>
<system.diagnos tics>
<trace autoflush="fals e" indentsize="4">
<listeners>
<add name="TextListe ner"
type="System.Di agnostics.TextW riterTraceListe ner"
initializeData= "Y:\Test\MyList ener.log"/>
</listeners>
</trace>
</system.diagnost ics>
</configuration>
<============== =============== =============== =============== =============== =
Reminder on how to setup the strong name key...
<============== =============== =============== =============== =============== = sn -k TextWriter.snk
<============== =============== =============== =============== =============== =
The exception that I get.
<============== =============== =============== =============== =============== = Unhandled Exception: System.Configur ation.Configura tionException: Exception
in configuration section handler (Y:\Test\TextWr iterNetwork.exe .config line
3) --
-> System.Reflecti on.TargetInvoca tionException: Exception has been thrown by
the target of an invocation. ---> System.Security .SecurityExcept ion: Request
for
the permission of type System.Security .Permissions.Fi leIOPermission,
mscorlib, Version=1.0.500 0.0, Culture=neutral ,
PublicKeyToken= b77a5c561934e08 9 failed.
at
System.Security .SecurityRuntim e.FrameDescHelp er(FrameSecurit yDescriptor
secDesc, IPermission demand, PermissionToken permToken)
at System.Security .CodeAccessSecu rityEngine.Chec k(PermissionTok en
permToken, CodeAccessPermi ssion demand, StackCrawlMark& stackMark, Int32
checkFrames, In
t32 unrestrictedOve rride)
at System.Security .CodeAccessSecu rityEngine.Chec k(CodeAccessPer mission
cap, StackCrawlMark& stackMark)
at System.Security .CodeAccessPerm ission.Demand()
at System.IO.FileS tream..ctor(Str ing path, FileMode mode, FileAccess
access, FileShare share, Int32 bufferSize, Boolean useAsync, String msgPath,
Boolean
bFromProxy)
at System.IO.FileS tream..ctor(Str ing path, FileMode mode, FileAccess
access, FileShare share, Int32 bufferSize)
at System.IO.Strea mWriter.CreateF ile(String path, Boolean append)
at System.IO.Strea mWriter..ctor(S tring path, Boolean append, Encoding
encoding, Int32 bufferSize)
at System.IO.Strea mWriter..ctor(S tring path, Boolean append)
at System.Diagnost ics.TextWriterT raceListener..c tor(String fileName)

The state of the failed permission was:
<IPermission class="System.S ecurity.Permiss ions.FileIOPerm ission, mscorlib,
Version=1.0.500 0.0, Culture=neutral , PublicKeyToken= b77a5c561934e08 9"
version="1"
Append="Y:\Test \MyListener.log "/>

--- End of inner exception stack trace ---
at System.Reflecti on.RuntimeConst ructorInfo.Inte rnalInvoke(Bind ingFlags
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean
isBin
derDefault)
at System.Reflecti on.RuntimeConst ructorInfo.Invo ke(BindingFlags
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at
System.Diagnost ics.Diagnostics ConfigurationHa ndler.HandleLis teners(Hashtabl e
config, XmlNode listenersNode, Object context)
at
System.Diagnost ics.Diagnostics ConfigurationHa ndler.HandleTra ce(Hashtable
config, XmlNode traceNode, Object context)
at System.Diagnost ics.Diagnostics ConfigurationHa ndler.Create(Ob ject
parent, Object configContext, XmlNode section)
at
System.Configur ation.Configura tionRecord.Eval uateRecursive(I ConfigurationSe c
tionHandler factory, Object config, String[] keys, Int32 iKey, XmlTextReade
r reader)
--- End of inner exception stack trace ---
at
System.Configur ation.Configura tionRecord.Eval uateRecursive(I ConfigurationSe c
tionHandler factory, Object config, String[] keys, Int32 iKey, XmlTextReade
r reader)
at System.Configur ation.Configura tionRecord.Eval uate(String configKey)
at System.Configur ation.Configura tionRecord.Reso lveConfig(Strin g
configKey)
at System.Configur ation.Configura tionRecord.GetC onfig(String configKey)
at
System.Configur ation.DefaultCo nfigurationSyst em.System.Confi guration.IConfi g
urationSystem.G etConfig(String configKey)
at System.Configur ation.Configura tionSettings.Ge tConfig(String
sectionName)
at System.Diagnost ics.Diagnostics Configuration.G etConfigTable()
at System.Diagnost ics.Diagnostics Configuration.I nitialize()
at System.Diagnost ics.Diagnostics Configuration.g et_IndentSize()
at System.Diagnost ics.TraceIntern al.InitializeSe ttings()
at System.Diagnost ics.TraceIntern al.get_Listener s()
at System.Diagnost ics.TraceIntern al.WriteLine(St ring message)
at System.Diagnost ics.Trace.Write Line(String message)
at TextWriterNetwo rk.Class1.Main( String[] args) in
d:\playground\o neoffs\textwrit ernetwork\textw riternetwork.cs :line 32
<============== =============== =============== =============== =============== =