Find the most frequent character or number in a string with C# .NET.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace Algorithms
{
    public class MaxChar
    {
        public char GetMostFrequentChar(string input)
        {
            var charMap = input.Distinct().ToDictionary(c => c, c => input.Count(s => s == c));
            return charMap.OrderByDescending(kvp => kvp.Value).First().Key;
        }
    }
}

You can get help from the given below Code 

 

Hello Rajeev,

Try below

            string input = "Aptara ";

            char mostFrequent = input
                .GroupBy(c => c)
                .OrderByDescending(g => g.Count())
                .First()
                .Key;

            Console.WriteLine("The most frequently occurring character is: " + mostFrequent);

Thanks

The easiest would be

string str= "Aptara";
var maxCharWithCount= (from c in str
                    group c by c into g
                    select new
                    {
                        c = g.Key,
                        count = g.Count(),
                    }).OrderByDescending(c => c.count).first();

    Console.WriteLine(maxCharWithCount.c + ": " + maxCharWithCount.count);

private static void GetMostFrequentCharacterFromString(string str)
{
            Dictionary chars = new Dictionary();

            foreach (char c in str.ToLower())
            {
                if (chars.ContainsKey(c)) chars[c]++;
                else chars.Add(c, 1);
            }

            int max = chars.Values.Max();
            var mostFoundCharacter = chars.Where(b => b.Value == max).Select(b => b.Key).First();

            Console.WriteLine($"Most Count Found for {mostFoundCharacter} : {max}");
}

Hi Rajeev,

Please try this code snippet,