using System;

public class Program

{

    public static void Main()

    {

        string sentence = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.";

        char[] charArray = sentence.ToCharArray();

​

        char chkWord = 'r';

        Console.WriteLine("Number of recursions is {0}", checkArray(charArray, chkWord));   

​

    }

    public static int checkArray(char[] x, char c){

        int counter = 0;

        foreach( char i in x ){

            if( i == c) counter++;

                else continue;  

        }

        return counter;

    }

}