Event Type: Warning
Event Source: W3SVC
Event Category: None
Event ID: 1009
Date: 9/28/2005
Time: 3:18:11
PM User: N/A
Computer: IIS-SERVER
Description:
A process serving application pool ‘DefaultAppPool’ terminated unexpectedly. The process id was ‘2548’. The process exit code was ‘0xe0434f4d’.

Event Type: Error
Event Source: .NET Runtime 2.0 Error Reporting
Event Category: None
Event ID: 5000
Date: 9/28/2005
Time: 3:18:02 PM
User: N/A
Computer: IIS-SERVER
Description:
EventType clr20r3, P1 w3wp.exe, P2 6.0.3790.1830, P3 42435be1, P4 app_web_7437ep-9, P5 0.0.0.0, P6 433b1670, P7 9, P8 a, P9 system.exception, P10 NIL.

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Method 1

• The virtual directory path in which the exception occurred
• The exception name
• The message
• The stack trace

1. Put the following code in a file that is named UnhandledExceptionModule.cs.

   using System;
   using System.Diagnostics;
   using System.Globalization;
   using System.IO;
   using System.Runtime.InteropServices;
   using System.Text;
   using System.Threading;
   using System.Web;
    
   namespace WebMonitor {
       public class UnhandledExceptionModule: IHttpModule {
   
           static int _unhandledExceptionCount = 0;
   
           static string _sourceName = null;
           static object _initLock = new object();
           static bool _initialized = false;
   
           public void Init(HttpApplication app) {
   
               // Do this one time for each AppDomain.
               if (!_initialized) {
                   lock (_initLock) {
                       if (!_initialized) { 
   
                           string webenginePath = Path.Combine(RuntimeEnvironment.GetRuntimeDirectory(), "webengine.dll"); 
   
                           if (!File.Exists(webenginePath)) {
                               throw new Exception(String.Format(CultureInfo.InvariantCulture,
                                                                 "Failed to locate webengine.dll at '{0}'.  This module requires .NET Framework 2.0.", 
                                                                 webenginePath));
                           } 
   
                           FileVersionInfo ver = FileVersionInfo.GetVersionInfo(webenginePath);
                           _sourceName = string.Format(CultureInfo.InvariantCulture, "ASP.NET {0}.{1}.{2}.0",
                                                       ver.FileMajorPart, ver.FileMinorPart, ver.FileBuildPart);
   
                           if (!EventLog.SourceExists(_sourceName)) {
                               throw new Exception(String.Format(CultureInfo.InvariantCulture,
                                                                 "There is no EventLog source named '{0}'. This module requires .NET Framework 2.0.", 
                                                                 _sourceName));
                           }
    
                           AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(OnUnhandledException);
    
                           _initialized = true;
                       }
                   }
               }
           }
   
           public void Dispose() {
           }
   
           void OnUnhandledException(object o, UnhandledExceptionEventArgs e) {
               // Let this occur one time for each AppDomain.
               if (Interlocked.Exchange(ref _unhandledExceptionCount, 1) != 0)
                   return;
   
               StringBuilder message = new StringBuilder("\r\n\r\nUnhandledException logged by UnhandledExceptionModule.dll:\r\n\r\nappId=");
   
               string appId = (string) AppDomain.CurrentDomain.GetData(".appId");
               if (appId != null) {
                   message.Append(appId);
               }
               
   
               Exception currentException = null;
               for (currentException = (Exception)e.ExceptionObject; currentException != null; currentException = currentException.InnerException) {
                   message.AppendFormat("\r\n\r\ntype={0}\r\n\r\nmessage={1}\r\n\r\nstack=\r\n{2}\r\n\r\n",
                                        currentException.GetType().FullName, 
                                        currentException.Message,
                                        currentException.StackTrace);
               }           
   
               EventLog Log = new EventLog();
               Log.Source = _sourceName;
               Log.WriteEntry(message.ToString(), EventLogEntryType.Error);
           }
   
       }
   }

2. Save the UnhandledExceptionModule.cs file to the following folder:
   C:\Program Files\Microsoft Visual Studio 8\VC
3. Open the Microsoft Visual Studio 2005 Command Prompt.
4. Type sn.exe -k key.snk, and then press ENTER.
5. Type csc /t:library /r:system.web.dll,system.dll /keyfile:key.snk UnhandledExceptionModule.cs, and then press ENTER.
6. Type gacutil.exe /if UnhandledExceptionModule.dll, and then press ENTER.
7. Type ngen install UnhandledExceptionModule.dll, and then press ENTER.
8. Type gacutil /l UnhandledExceptionModule, and then press ENTER to display the strong name for the UnhandledExceptionModule file.
9. 9. Add the following code to the Web.config file of your ASP.NET-based application.

   <add name="UnhandledExceptionModule" 
   	type="WebMonitor.UnhandledExceptionModule, <strong name>" />

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Method 2

<configuration>
    <runtime>
        <legacyUnhandledExceptionPolicy enabled="true" />
    </runtime>
</configuration>

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