Max occured character in a string, C#

Max occured character in a string

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine(MostOccurringCharInString("aaaacffffdgg"));
        }
        
        public static char MostOccurringCharInString(string charString)
        {
            int mostOccurrence = -1;
            char mostOccurringChar = ' ';
            foreach (char currentChar in charString)
            {
                int foundCharOccreence = 0;
                foreach (char charToBeMatch in charString)
                {
                    if (currentChar == charToBeMatch)
                        foundCharOccreence++;
                }
                if (mostOccurrence < foundCharOccreence)
                {
                    mostOccurrence = foundCharOccreence;
                    mostOccurringChar = currentChar;
                }
            }
            return mostOccurringChar;
        }
    }
}


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