3. Check if a String Contains only Identical Characters

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

namespace EdabitChallenges
{
    class Program
    {
        public static void Main(string[] args)
        {
            string phrase = Console.ReadLine();
            Console.WriteLine(isIdentical(phrase));
            Console.ReadLine();
		}
            static  bool isIdentical(string str)
            {
                return str.Distinct().Count() == 1; // numara cate secvente de caractere se repeta
            }
    }
}