While I was busy customizing Microsoft's Exception Management Application Block to classify and log all exceptions thrown in our web and Windows apps, and writing instrumentation code that published timing events via System.Diagnostics.Trace, Microsoft was busy writing ASP.NET Health Monitoring. Microsoft has more resources, so their product is a little more advanced and customizable. Here's what it provides: An event model: There are event classes for web request failures, for authentication failures, ......
The .NET Framework provides built-in capabilities for creating components and services as singletons. If you want to create a singleton process, though, you're on your own. But not really; if you read on, you will find out how to use a Mutex to do the job.