Example

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp20
{
    class Program
    {
        //delegate int Howdy(char symbol, string text);

        static void Main(string[] args)
        {
            Func<char, string, int> GetValue;
            GetValue = HowManySymbols;
            GetValue += IndexOfFirst;
            string text = Console.ReadLine();
            char symbol = char.Parse(Console.ReadLine());
            //Howdy howdy = HowManySymbols;
            //howdy += IndexOfFirst;
            //howdy.Invoke(symbol, text);
            GetValue.Invoke(symbol, text);
        }

        static int HowManySymbols(char symbol, string text)
        {
            int count = 0;
            foreach (var letter in text)
            {
                if (letter == symbol)
                    count++;
            }
            return count;
        }

        static int IndexOfFirst(char symbol, string text)
        {
            for (int i = 0; i<text.Length; i++)
            {
                if (text[i] == symbol)
                    return i;
            }
            return -1;
        }
    }
}