HUman

using System;
using System.Collections.Generic;
using System.Text;

namespace Mankind11b
{
    public abstract class Human
    {
        private string firstName;
        private string lastName;

        public Human(string firstName, string lastName)
        {
            FirstName = firstName;
            LastName = lastName;
        }

        public string FirstName
        {
            get { return firstName; }
            set {
                if (!Char.IsUpper(value[0])) //!(value[0]>='A' && value[0]<='Z')
                {
                    throw new ArgumentException("Expected upper case letter! Argument: firstName");
                }
                if (value.Length < 4)
                {
                    throw new ArgumentException("Expected length at least 4 symbols! Argument: firstName");
                }
                firstName = value;
            }
        }

        public string LastName
        {
            get { return lastName; }
            set {
                if (!Char.IsUpper(value[0]))
                {
                    throw new ArgumentException("Expected upper case letter! Argument: lastName");
                }
                if(value.Length < 3)
                {
                    throw new ArgumentException("Expected length at least 3 symbols! Argument: lastName");
                }
                lastName = value;
            }
        }

        public override string ToString()
        {
            return $"First Name: {FirstName}\nLast Name: {LastName}";
        }
    }
}