First C# PassGen / Criss

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PassGen
{
    class Program
    {
        static string generatePswd(int lenght)
        {
            const string validChars = "1234567890qwertyuiopasdfghjklzxcvbnm";
            StringBuilder res = new StringBuilder();
            Random rnd = new Random();
            while (0 < lenght--)
            {

                res.Append(validChars[rnd.Next(validChars.Length)]);
            }
            return res.ToString();
        }
        static void Main(string[] args)
            {
            //password lenght
            int lenght = 10;

        string pass = generatePswd(lenght);
            Console.Write(pass);



        }
    }
}