How to find most repeated character in given string using c#

The below code to  find most repeated character in given string in c#.

using System;

namespace MostRepeatedCharacter

{

    class Program

    {

        static Char GetMostRepeatedChar(string str)

        {
             // declare integer Array to count number of most repeated characters. 

            int[] count = new int[256];

            int Max = 0;

            Char result = Char.MinValue;

         // Traversing each character from left to right.

            foreach (Char c in str)

            {

               // To check if empty space and collecting repeated characters here.

                if (c !=' ' && ++count[c] > Max)

                {

                    Max = count[c];

                    result = c;

                }

            }

            return result;

        }

        static void Main(string[] args)

        {

            

            string str = "SWISS";

            Console.WriteLine("Most repeated character '{0}'", GetMostRepeatedChar(str));

            Console.ReadLine();

        }

    }

}

Out put : Most repeated character: S.