Home work - draw bar

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

namespace Home_Work
{
    class Program
    {
        static void Main(string[] args)
        {
            int maxHealth = 100;
            int health = 55;
            int healthPositionY = 0;
            ConsoleColor healthColor = ConsoleColor.Red;

            int maxMana = 200;
            int mana = 2000;
            int manaPositionY = 1;
            ConsoleColor manaColor = ConsoleColor.Blue;

            DrawBar(health, maxHealth, healthPositionY, healthColor);
            DrawBar(mana, maxMana, manaPositionY, manaColor);

            Console.ReadKey();

        }

        static void DrawBar(int value, int maxValue, int positionY, ConsoleColor backgroundColor)
        {
            Console.SetCursorPosition(0, positionY);

            if (CheckValueInvalid(value, maxValue))
            {
                Console.WriteLine("Ошибка данных!");
                return;
            }

            string bar;
            ConsoleColor defaulthColor = Console.BackgroundColor;
            int percentValue = value * 10 / maxValue;

            bar = CalculateBar(0, percentValue);

            Console.Write("[");
            Console.BackgroundColor = backgroundColor;
            Console.Write(bar);

            bar = CalculateBar(percentValue, 10);

            Console.BackgroundColor = defaulthColor;
            Console.Write(bar);
            Console.Write("]");
        }

        static string CalculateBar (int startValue, int endValue)
        {
            string bar = "";
            char barElement = ' ';

            for (int i = startValue; i < endValue; i++)
            {
                bar += barElement;
            }

            return bar;
        }

        static bool CheckValueInvalid(int value, int maxValue)
        {
            if (value < 0 || value > maxValue)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
    }
}