Find number of letter occurence of all letter in c#

 Find number of letter occurence of all letter in c#

 namespace ConsoleApp1
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string text = "Hello World!";
            var frequencyMap = new Dictionary<char, int>();

            foreach (char c in text)
            {
                if (frequencyMap.ContainsKey(c))
                {
                    frequencyMap[c]++;
                }
                else
                {
                    frequencyMap[c] = 1;
                }
            }

            foreach (var entry in frequencyMap)
            {
                Console.WriteLine($"'{entry.Key}': {entry.Value}");
            }
        }
    }
}

Find number of occurence of string in Text in C#

 Find number  of occurence of string in Text in C#

using System;

public class HelloWorld
{
    public static void Main(string[] args)
    {
       string text = "appleorangeapplebananaappleapp";
       string pattern = "apple";

int count = text.Split(new[] { pattern }, StringSplitOptions.None).Length - 1;

Console.WriteLine(count);
    }
} 

 Output :

3