title: Append custom value to IIS logs from ASP.NET
body: <p>I would simply like to append an additional value which is generated at runtime in a page to my IIS log entry for the current request (or as an alternative, overwrite one of the standard fields with my custom value). </p>
  
  <p>I can't find a way to do this and I can't find an example of writing a custom log handler in C# (I'm not proficient in С++)</p>
  
  <p>Any help is appreciated, thanks. </p>