Serilog - Enrich Exception Logs with Server Variables

ExceptionEnricher.cs

public class ExceptionEnricher : ILogEventEnricher
{
    /// <summary>
    /// The server variables added to an exception log.
    /// </summary>
    public void Enrich(LogEvent logEvent, ILogEventPropertyFactory propertyFactory)
    {
        if (logEvent == null)
            throw new ArgumentNullException("logEvent");

        if (logEvent.Exception == null) return;
        if (HttpContext.Current == null) return;

        var context = new HttpContextWrapper(HttpContext.Current);

        NameValueCollection collection = context.Request.ServerVariables;

        var logEvents = from string key in collection
            let value = collection[key]
            select new LogEventProperty(key, new ScalarValue(value));

        foreach (var log in logEvents)
        {
            logEvent.AddPropertyIfAbsent(log);
        }
    }
}