Console Application Closes Immediately After Opening in Visual Studio

Preventing console window from closing on Visual Studio C/C++ Console application

Starting from Visual Studio 2017 (15.9.4) there is an option:

Tools->Options->Debugging->Automatically close the console

The corresponding fragment from the Visual Studio documentation:

Automatically close the console when debugging stops:

Tells Visual Studio to close the console at the end of a debugging session.

Console immediately closes with CTRL+F5

Did you create this using the console app template? If not, try doing that.

You can check that it's set correctly by making sure that the output type (properties --> Application --> Output type) is set to 'Console Application' for this to work when pressing CTRL + F5

C# console .exe file opens and closes immediately after

Add Console.ReadLine(); or Console.ReadKey(); on end of the code.

Like this:

static void Main(string[] args)
{
    //code here

    Console.ReadLine();
}

Read more here: Why is the console window closing immediately once displayed my output?

Console application closes immediately after opening in visual studio

This is an ancient problem and has inspired several funny cartoons:

Let's fix it. What you want to do is prompt the user to press the Any key when the console app was started from a shortcut on the desktop, Windows Explorer or Visual Studio. But not when it was started from the command processor running its own console. You can do so with a little pinvoke, you can find out if the process is the sole owner of the console window, like this:

using System;

class Program {
    static void Main(string[] args) {
        Console.WriteLine("Working on it...");
        //...
        Console.WriteLine("Done");
        PressAnyKey();
    }

    private static void PressAnyKey() {
        if (GetConsoleProcessList(new int[2], 2) <= 1) {
            Console.Write("Press any key to continue");
            Console.ReadKey();
        }
    }

    [System.Runtime.InteropServices.DllImport("kernel32.dll")]
    private static extern int GetConsoleProcessList(int[] buffer, int size);
}

Why is the console window closing immediately once displayed my output?

the issue here is that their Hello World Program is showing up then it would immediately close.

why is that?

Because it's finished. When console applications have completed executing and return from their main method, the associated console window automatically closes. This is expected behavior.

If you want to keep it open for debugging purposes, you'll need to instruct the computer to wait for a key press before ending the app and closing the window.

The Console.ReadLine method is one way of doing that. Adding this line to the end of your code (just before the return statement) will cause the application to wait for you to press a key before exiting.

Alternatively, you could start the application without the debugger attached by pressing Ctrl+F5 from within the Visual Studio environment, but this has the obvious disadvantage of preventing you from using the debugging features, which you probably want at your disposal when writing an application.

The best compromise is probably to call the Console.ReadLine method only when debugging the application by wrapping it in a preprocessor directive. Something like:

#if DEBUG
    Console.WriteLine("Press enter to close...");
    Console.ReadLine();
#endif

You might also want the window to stay open if an uncaught exception was thrown. To do that you can put the Console.ReadLine(); in a finally block:

#if DEBUG
    try
    {
        //...
    }
    finally
    {
        Console.WriteLine("Press enter to close...");
        Console.ReadLine();
    }
#endif

C# Console Application crashes when start debugging, but not without debugger

Are you sure it is crashing NOT auto closing after execution?

Code seems correct to me, just add the following line after last line inside main function.

Console.ReadKey();

C# console app closes itself after I run it

Just add Console.ReadKey(); after printing the value.

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

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = 10;
            int b = 20;
            int c = a * b;

            Console.WriteLine(c);
            Console.ReadKey();
        }
    }
}

How do I stop the console window from closing in Visual studio 2019?

If possible, make the project type you create an F# .NET Core console app (which should be the first F# template in the New Project dialog). This uses a different system under the hood where the console window stays open and is re-used by subsequent runs.

How to stop C++ console application from exiting immediately?

Edit: As Charles Bailey rightly points out in a comment below, this won't work if there are characters buffered in stdin, and there's really no good way to work around that. If you're running with a debugger attached, John Dibling's suggested solution is probably the cleanest solution to your problem.

That said, I'll leave this here and maybe someone else will find it useful. I've used it a lot as a quick hack of sorts when writing tests during development.

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At the end of your main function, you can call std::getchar();

This will get a single character from stdin, thus giving you the "press any key to continue" sort of behavior (if you actually want a "press any key" message, you'll have to print one yourself).

You need to #include <cstdio> for getchar.

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