Why doesn't Console.WriteLine work in Visual Studio Code?

Question

I have scriptcs and coderunner installed on Visual Studio Code. When I run a simple program that includes Console.WriteLine("Test") I don't see any output. The program seems to run successfully and exits with code 0.

Any suggestions?

Here's all the code in case anyone is interested:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Test");
    }
}

Answer 1

If you are just trying to run a cs file without a project etc then the problem is that code runner is treating the file as a script. As such the main method is actually not being invoked as it would be if running a console app.

The solution therefore is to make your main method public and add a call to Program.Main(null); after the class definition. This solution does not require any launch.json config file or config changes. Note the call to Program.Main after the class definition does show as an error in VS code but it runs fine in code runner. See the code block below.

using System;
class Program
{
    public static void Main(string[] args)
    {
        Console.WriteLine("Test");
    }
}

Program.Main(null);

I found the answer to this here: https://stackoverflow.com/a/46179597

Answer 2

In launch.json there should be a field called 'console':

Changing it from:

  "console": "internalConsole",

To:

  "console": "externalTerminal",

fixed it for me.

Answer 3

It will show your output if you will press ctrl+F5. You will get the output in console window. Another solution, if you will write Console.ReadLine(); after console.writeline, it will remain open console window until you will not press any key.

Answer 4

You need to add any one of following line code

Console.Readline()
Console.Read()
Console.ReadKey()

example:

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Test");
        Console.ReadLine();
    }
}

Answer 5

The code did compile and then run but it wen't very fast and the console application closed itself after the execution. To prevent this from happening you need to add another method like:

• Console.Read();

or

• Console.ReadLine();

(The Line stands for linefeed, that means that the cursor moves to the next line to the left).

This way, the application will close if you press the 'enter' key on your keyboard.

Answer 6

You need to do this

Console.WriteLine("Hello");
string name = Console.ReadLine();