RandomMaster.cs

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

namespace myClasses
{
    public class RandomMaster
    {
        static Random random = new Random();
        static string[] numbers = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9"};
        static string[] alphabet = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z" };

        public static bool randomBool(int chance, int max)
        {
            int rNum = random.Next(max);
            if (rNum <= chance) return true;
            else return false;
        }

        public static string randomString(int length) {
            string randomString = "";
            for (int i = 0; i < length; i++ ) {
                if (randomBool(50, 100)) {
                    if (randomBool(50, 100)) { randomString += alphabet[random.Next(alphabet.Length)]; }
                    else { randomString += alphabet[random.Next(alphabet.Length)].ToUpper(); }
                }
                else {
                    randomString += numbers[random.Next(numbers.Length)];
                }
            }
            return randomString;
        }

        public static string randomStringLetters(int length)
        {
            string randomString = "";
            for (int i = 0; i < length; i++)
            {
                if (randomBool(50, 100))
                {
                    if (randomBool(50, 100)) { randomString += alphabet[random.Next(alphabet.Length)]; }
                    else { randomString += alphabet[random.Next(alphabet.Length)].ToUpper(); }
                }
            }
            return randomString;
        }

        public static string randomStringNumbers(int length)
        {
            string randomString = "";
            for (int i = 0; i < length; i++)
            {
                randomString += numbers[random.Next(numbers.Length)];
            }
            return randomString;
        }

        public static int randomRange(int min, int max) {
            return random.Next(min, max);
        }
    }
}