With Arguments, C#

With Arguments

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

Correct Inputs :
        {} 
    ,   {"--NAME", "codility#"} ,{"--COUNT", "100"},{"--HELP"} 
    ,   {"--NAME", "code","--COUNT", "50"} , {"--NAME", "code$","--HELP"} , {"--COUNT", "10","--HELP"}
    
    ,   {"--COUNT", "50","--NAME", "code"} , {"--HELP","--NAME", "code$"} , {"--HELP","--COUNT", "10"}
    ,  
    ,    {"--NAME", "codility#","--COUNT", "10","--HELP"} , {"--COUNT","10","--NAME", "codility#", "--HELP"}  
         {"--HELP", "--COUNT","10","--NAME", "codility#"}  , {"--HELP","--NAME", "codility#","--COUNT", "10"}
         
         {"--NAME", "codility#","--HELP","--COUNT", "10"} ,  {"--COUNT","10","--HELP","--NAME", "codility#"}

Wrong Inputs:
     
     Character checking : 
     {"--NAME","XX"}, {"--NAME","xxx"} , {"--NAME","abcdex78nm"} ,
     Count checking :
     {"--COUNT", "101"}, {"--COUNT", "9"} , {"--COUNT", "-9"}
     
     {"--COUNT", "ssssss"}, {"--COUNT", "ss"}
     
     {"--COUNT", ""} ,
     
     {"--NAME",""},
     
     {"--HELP", "--NAME",""} , {"--HELP", "--COUNT",""}
      {"--HELP", "--NAME","8292"} , {"--HELP", "--COUNT","khkh"}
      
      {"kjkjkk"}
      
       {"--NAME", "codility#","--HELP","--COUNT", "10","--COUNT", "0"}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            
            var val = new ValidateArguments();
            try{
                   args = new string[] {"--NAME", "codility#"};
                   var result = val.Validate(args);
                   Console.WriteLine(result);
               
            }catch( Exception e){
                Console.WriteLine( "Exception Occured: {0}", e.Message);
            }
            
        }
    }
}

public class ValidateArguments
    {
        private const int WRONG_ARGS = -1;
        private const int OK_ARGS = 0;
        private const int HELP_ARGS = 1;

private const string NAME_ARG = "--NAME";
        private const string COUNT_ARG = "--COUNT";
        private const string HELP_ARG = "--HELP";

public int Validate(string[] args)
        {
            var help_present = false;
            var args_valid = true;
            for (var i = 0; i < args.Length;)
            {
                var arg = args[i].ToUpperInvariant();

if (arg == NAME_ARG)
                {
                    if (i + 1 >= args.Length)
                    {
                        args_valid = false;
                        break;
                    }
                    // we do not care whats up next
                    var val = args[i + 1];
                    if(val.Length <= 3 || val.Length>=10){
                          args_valid = false;
                            break;
                    }
                    i += 2;
                }
                else if (arg == COUNT_ARG)
                {
                    if (i + 1 >= args.Length)
                    {
                        args_valid = false;
                        break;
                    }

if (args_valid)
            {
                if (help_present)
                {
                    return HELP_ARGS;
                }

return OK_ARGS;
            }
            
            return WRONG_ARGS;
        }
    }


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