C# check if you have passed arguments or not

Question

I have this code:

public static void Main(string[] args)
{         
    if (string.IsNullOrEmpty(args[0]))  // Warning : Index was out of the bounds of the a         


        

Answer 1

Another available option if you're already using System.Linq is to make use of the Any() extension, for instance:

public static void Main(string[] args)
{
    if (args == null && !args.Any())
    {
        // No parameters passed.
        ComputeNoParam cptern = new ComputeNoParam();
        cptern.ComputeWithoutParameters();

        return;
    }

    // process parameters
    ComputeParam cpter = new ComputeParam();
    foreach (string s in args){...}
}

This could also be written:

public static void Main(string[] args)
{
    if (!args?.Any() ?? true)
    {
        // No parameters passed.
        ComputeNoParam cptern = new ComputeNoParam();
        cptern.ComputeWithoutParameters();

        return;
    }

    // process parameters
    ComputeParam cpter = new ComputeParam();
    foreach (string s in args){...}
}

This just shows another option available to you, I'd agree with going with .Length, although I would drop the null check and use conditional access instead, so.

if (args?.Length == 0) {
    // Code hit if args is null or zero
}