What is "string[] args" in Main class for?
Further to everyone else's answer, you should note that the parameters are optional in C# if your application does not use command line arguments.
This code is perfectly valid:
internal static Program
{
private static void Main()
{
// Get on with it, without any arguments...
}
}
From the C# programming guide on MSDN:
The parameter of the Main method is a String array that represents the command-line arguments
So, if I had a program (MyApp.exe) like this:
class Program
{
static void Main(string[] args)
{
foreach (var arg in args)
{
Console.WriteLine(arg);
}
}
}
That I started at the command line like this:
MyApp.exe Arg1 Arg2 Arg3
The Main method would be passed an array that contained three strings: "Arg1", "Arg2", "Arg3".
If you need to pass an argument that contains a space then wrap it in quotes. For example:
MyApp.exe "Arg 1" "Arg 2" "Arg 3"
Command line arguments commonly get used when you need to pass information to your application at runtime. For example if you were writing a program that copies a file from one location to another you would probably pass the two locations as command line arguments. For example:
Copy.exe C:\file1.txt C:\file2.txt