Best "error logging tool in ASP.NET ?

SmartInspect – the logging tool developed by my company Gurock Software.

Example-

using System; using Gurock.SmartInspect;  public class EntryPoint {    public static void Main(string[] args)    {       SiAuto.Si.Connections = @"file(filename=c:\log.sil)";       SiAuto.Si.Enabled = true;        SiAuto.Main.LogMessage("This is a message!");       SiAuto.Main.LogError("This is an error!");        SiAuto.Main.LogValue("MyInt", 5);       SiAuto.Main.LogSql("GetAllCustomers",            "SELECT * FROM customers");       SiAuto.Main.LogObject("Main", SiAuto.Main);        SiAuto.Main.Watch("MyWatch", 2);       SiAuto.Main.Watch("MyWatch", 7);    } }
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You can find other tools details on -

http://www.dotnetlogging.com/

Hope this helps