Writing to output window of Visual Studio?
 I am trying to write a message to the output window for debugging purposes.  I searched for a function like Java's system.out.println("") .  I tried Debug.Write , Console.Write , and Trace.Write .  It does not give an error, but it does not print anything either.  
"Define DEBUG constant" and "Define TRACE constant" options are checked.
Menu Tools → Options → Debugging → "Redirect all Output Window text to the Immediate Window" option is not checked.
Configuration: Active (Debug)
Note: I created a project with the wizard as "Windows Forms Application" if relevant. I have no idea where to look.
 Add the System.Diagnostics namespace, and then you can use Debug.WriteLine() to quickly print a message to the output window of the IDE.  For more details, please refer to these:  
这将写入调试输出窗口:
using System.Diagnostics;
Debug.WriteLine("Send to debug output.");
使用:
System.Diagnostics.Debug.WriteLine("your message here");
