I'm studying C# by following the guides in MSDN.
Now, I just tried the Example 1 (here is the link to MSDN), and I've encountered an issue: why is the console window closing immediately once displayed my output?
using System;
public class Hello1
{
public static int Main()
{
Console.WriteLine("Hello, World!");
return 0;
}
}
Best Answer
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 thereturn
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: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 afinally
block: