Question

I have a tool which I want to run from my command prompt.

The code is as

    static void Main(string[] args)
    {

        string User;            
        if (args[0].Length  != 0)
        {
             User = args[0];
        }
        else
        {
        Console.Write("Please Enter the Username");
        User = Console.ReadLine();
        }

If I didnt give the username or the first argument after my ‘tool.exe’ in command prompt, it throws an exception like “Index was outside the bounds of the array”

I want ouptut as, if I didnt give argument – it should prompt me to give the username. please help me out.

Answer 1

args is an array, and is what you should be checking for length. When you check args[0].Length you’re actually assuming there’s atleast one element in the array already and thus you’re checking Length of the first item.

Try

if (args.Length != 0)

instead, which checks the length of the array of command line parameters.