Console WriteLine does not show up in Output window

Question

I have put some Console WriteLine calls in to test  but they aren t appearing in the output box   public static ArrayList myDeliveries   new ArrayList     public mainForm        InitializeComponent       private void mainForm Load object sender  EventArgs e        if   File Exists        MealDeliveries txt             MessageBox Show  File not found             return             using  StreamReader sr   new StreamReader        MealDeliveries txt               first line is delivery name          string strDeliveryName   sr ReadLine            Console WriteLine  Test content             while  strDeliveryName    null                  other lines              Delivery d   new Delivery                  strDeliveryName                   sr ReadLine                    sr ReadLine                     sr ReadLine                    sr ReadLine                     sr ReadLine                    sr ReadLine                               mainForm myDeliveries Add d                  check for further values             strDeliveryName   sr ReadLine                         displayDeliveries          private void displayDeliveries         lstDeliveryDetails Items Clear        Console WriteLine  Test content        Console WriteLine mainForm myDeliveries Count       foreach  Delivery d in mainForm myDeliveries           lstDeliveryDetails Items Add d DeliveryName              Can anyone help

User · Answer

Old Thread  But in VS 2015 Console WriteLine does not Write to Output Window If  Enable the Visual Studio Hosting Process  does not Checked or its Disabled in Project Properties -  Debug tab

User · Answer

Console outputs to the console window and Winforms applications do not show the console window   You should be able to use System Diagnostics Debug WriteLine to send output to the output window in your IDE   Edit  In regards to the problem  have you verified your mainForm Load is actually being called   You could place a breakpoint at the beginning of mainForm Load to see   If it is not being called  I suspect that mainForm Load is not hooked up to the Load event     Also  it is more efficient and generally better to override On EventName  instead of subscribing to  EventName  from within derived classes  in your case overriding OnLoad instead of Load

User · Answer

When issue happening on Mac VS 2017  Which I faced     Go to Project     Your Project name  options   An option window will pop up Go to RUN    Default menu option  Tick the  Run on external console  option TRUE and say OK   Run your application code now

User · Answer

If you intend to use this output in production  then use the Trace class members   This makes the code portable  you can wire up different types of listeners and output to the console window  debug window  log file  or whatever else you like   If this is just some temporary debugging code that you re using to verify that certain code is being executed or has the correct values  then use the Debug class as Zach suggests   If you absolutely must use the console  then you can attach a console in the program s Main method

User · Answer

If you are developing a command line application  you can also use Console ReadLine   at the end of your code to wait for the  Enter  keypress before closing the console window so that you can read your output  However  both the Trace and Debug answers posted above are better options

User · Answer

Using Console WriteLine   Test     is able to write log messages to the Output Window  View Menu --  Output  in Visual Studio for a Windows Forms WPF project   However  I encountered a case where it was not working and only System Diagnostics Debug WriteLine   Test     was working  I restarted Visual Studio and Console WriteLine   started working again  Seems to be a Visual Studio bug

User · Answer

If you want Console WriteLine  example text   output to show up in the Debug Output window  temporarily change the Output type of your Application from Console Application to Windows Application     From menus choose Project    Properties  and navigate to Output type  drop down  change to Windows Application then run your application  Of course you should change it back for building a console application intended to run outside of the IDE    tested with Visual Studio 2008 and 2010  expect it should work in latter versions too

User · Answer

Try to uncheck the CheckBox    Use Managed Compatibility Mode    in      Tools    Options    Debugging    General   It worked for me

User · Answer

Select view  Output to open output window    In the output window  you can see the result

[c#] Console.WriteLine does not show up in Output window

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