http://www.jb51.net/article/1303.htm
Page:
<%@ Page Language="C#" Trace="true" %> Web.Congig:
<trace enabled="true" mostRecent="true" traceMode="SortByTime" requestLimit="10000" localOnly="false" pageOutput ="true"/>
2.System.Diagnostics.Trace
http://www.haogongju.net/art/1018237
System.Diagnostics.Trace.Assert(false, "Hello");
http://wenwen.soso.com/z/q114732761.htm