Where does System Diagnostics Debug Write output appear

Question

The following C  program  built with csc hello cs  prints just Hello via Console  on the console and Hello via OutputDebugString in the DebugView window  However  I cannot see either of the System Diagnostics   calls  Why is that   using System  using System Runtime InteropServices  class Hello        DllImport  kernel32 dll   CharSet CharSet Auto       public static extern void OutputDebugString string message        static void Main             Console Write   Hello via Console              System Diagnostics Debug Write   Hello via Debug              System Diagnostics Trace Write   Hello via Trace              OutputDebugString   Hello via OutputDebugString               Is there maybe some special command-line switches required for csc   I m not using Visual Studio for any of my development  this is pure commandline stuff

User · Accepted Answer

As others have pointed out  listeners have to be registered in order to read these streams  Also note that Debug Write will only function if the DEBUG build flag is set  while Trace Write will only function if the TRACE build flag is set   Setting the DEBUG and or TRACE flags is easily done in the project properties in Visual Studio or by supplying the following arguments to csc exe      define DEBUG TRACE

User · Answer

You need to add a TraceListener to see them appear on the Console   TextWriterTraceListener writer   new TextWriterTraceListener System Console Out   Debug Listeners Add writer     They also appear in the Visual Studio Output window when in Debug mode

User · Answer

While debugging System Diagnostics Debug WriteLine will display in the output window  Ctrl Alt O   you can also add a TraceListener to the Debug Listeners collection to specify Debug WriteLine calls to output in other locations   Note  Debug WriteLine calls may not display in the output window if you have the Visual Studio option  Redirect all Output Window text to the Immediate Window  checked under the menu Tools   Options   Debugging   General  To display  Tools   Options   Debugging   check the box next to  Tools   Options   Show All Settings

User · Answer

When I write debug write     in the code  it outputs in the  Immediate window   not  Output window    You can try it  For displaying the  Immediate  window  Debug   Window   Immediate

User · Answer

For VB NET the following applies  You have to select  Debug  AND make sure that you  Start Debugging   This can be reached by pressing F5   Also the Console WriteLine will only display messages when building as  Release  in your Output window   As mentioned before  open the Output window with View   Output AND make sure to select either  Build  if you want to see Console WriteLine messages or  Debug  if you want to see Debug WriteLine or Trace WriteLine messages

User · Answer

The solution for my case is    Right click the output window   Check the  Program Output

User · Answer

The Diagnostics messages are displayed in the Output Window

User · Answer

While you are debugging in Visual Studio  display the  Output  window  View- Output   It will show there

[c#] Where does System.Diagnostics.Debug.Write output appear?

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