The Console.WriteLine method is used to write a line of text to the console window in a .NET application. In .NET 6.0, the Console.WriteLine method will only write to the console window if the application is a console application, not if it is a Windows Forms or WPF application. This is because console applications have a console window where the output from Console.WriteLine is shown, but Windows Forms and WPF applications do not have a console window.
If you are using .NET 6.0 and your application is a Windows Forms or WPF application, the Console.WriteLine method will not write anything to the console window, and you will not see any output from Console.WriteLine in the Output panel in Visual Studio.
To see the output from Console.WriteLine in a Windows Forms or WPF application in .NET 6.0, you can do one of the following:
- Use the Debug.WriteLine method instead of Console.WriteLine. The output from Debug.WriteLine will be shown in the Output panel when running the application in Debug mode.
- Redirect the output from Console.WriteLine to a different output stream, such as a file or a log, by using the Console.SetOut method and providing a custom TextWriter that writes to the desired output.
- If you are using a WPF application, you can add a text box to the window and use the Console.SetOut method to redirect the output from Console.WriteLine to the text box, as shown in the previous answer.
Note that the Console.WriteLine method will work as expected in .NET 4.8, because in .NET 4.8 the Console.WriteLine method will write to the console window regardless of whether the application is a console application, a Windows Forms application, or a WPF application. However, in .NET 6.0 and later versions, the behavior of the Console.WriteLine method has been changed to only write to the console window for console applications.