c# - What is UserStackFrame in NLOG and how to get it? -

in application got logeventinfo.userstackframe property null. want set it, , how set it?

we need make sure first userstackframe. see here.

using system; using system.collections; using system.diagnostics; using system.reflection;  using nlog.filters; using nlog.targets; using nlog.internal;  namespace nlog { internal sealed class loggerimpl {     private loggerimpl() { }      private const int stack_trace_skip_methods = 0;      private static assembly nlogassembly = typeof(logger).assembly;      internal static void write(type loggertype, targetwithfilterchain targets, logeventinfo logevent, logfactory factory)     {         if (targets == null)             return;  #if !netcf                     bool needtrace = false;         bool needtracesources = false;          int nst = targets.needsstacktrace;          if (nst > 0)             needtrace = true;         if (nst > 1)             needtracesources = true;          stacktrace stacktrace = null;         if (needtrace && !logevent.hasstacktrace)         {             int firstuserframe = 0;             stacktrace = new stacktrace(stack_trace_skip_methods, needtracesources);              (int = 0; < stacktrace.framecount; ++i)             {                 system.reflection.methodbase mb = stacktrace.getframe(i).getmethod();                  if (mb.declaringtype.assembly == nlogassembly || mb.declaringtype == loggertype)                 {                     firstuserframe = + 1;                 }                 else                 {                     if (firstuserframe != 0)                         break;                 }             }             logevent.setstacktrace(stacktrace, firstuserframe);         } #endif          (targetwithfilterchain awf = targets; awf != null; awf = awf.next)         {             target app = awf.target;             filterresult result = filterresult.neutral;              try             {                 filtercollection filterchain = awf.filterchain;                  (int = 0; < filterchain.count; ++i)                 {                     filter f = filterchain[i];                     result = f.check(logevent);                     if (result != filterresult.neutral)                         break;                 }                 if ((result == filterresult.ignore) || (result == filterresult.ignorefinal))                 {                     if (internallogger.isdebugenabled)                     {                         internallogger.debug("{0}.{1} rejecting message because of filter.", logevent.loggername, logevent.level);                     }                     if (result == filterresult.ignorefinal)                         return;                     continue;                 }             }             catch (exception ex)             {                 internallogger.error("filterchain exception: {0}", ex);                 if (factory.throwexceptions)                     throw;                 else                     continue;             }              try             {                 app.write(logevent);             }             catch (exception ex)             {                 internallogger.error("target exception: {0}", ex);                 if (factory.throwexceptions)                     throw;                 else                     continue;             }             if (result == filterresult.logfinal)                 return;         }     } } } 

if want highest level function call, use msdn.

stacktrace st = new stacktrace();    // display recent function call.   stackframe sf = st.getframe(0);   console.writeline();   console.writeline("  exception in method: ");   console.writeline("      {0}", sf.getmethod());    if (st.framecount >1)   {      // display highest-level function call        // in trace.      sf = st.getframe(st.framecount-1);      console.writeline("  original function call @ top of call stack):");      console.writeline("      {0}", sf.getmethod());   }