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

namespace ConsoleApplication28
{
    class Program
    {
        static void Main(string[] args)
        {
            CharCount obj = new CharCount();

            Console.WriteLine("Please, enter your string: /n");
            string usrString = Console.ReadLine();
            obj = ReturnCount(usrString);
            Console.WriteLine("lettercount is {}", obj.letterCount);
            Console.WriteLine("lettercount is {}", obj.upRegCount);
            Console.WriteLine("lettercount is {}", obj.lowRegCount);
            Console.WriteLine("lettercount is {}", obj.digitCount);
            Console.WriteLine("lettercount is {}", obj.wsCount);
        }

        public static CharCount ReturnCount(string baseString)
        {
            CharCount obj = new CharCount();

            foreach (char i in baseString)
            {
                if (char.IsLetter(i))
                {
                    obj.letterCount++;
                    if (char.IsLower(i))
                        obj.lowRegCount++;
                    else
                        obj.upRegCount++;
                }
                else if (char.IsDigit(i))
                    obj.digitCount++;
                else if (char.IsWhiteSpace(i))
                    obj.wsCount++;
                else
                    Console.WriteLine("Please input correct string");
            }
            return obj;
        }
    }

    public class CharCount
    {
        public int letterCount;
        public int digitCount;
        public int upRegCount;
        public int lowRegCount;
        public int wsCount;
    }
}