问题 E: C#统计字符出现的个数

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace 统计字符串中数字字符的个数
{
 
    class Program
    {
        static void Main(string[] args)
        {
            string str = Console.ReadLine();
            char ch = (char)Console.Read();
            Program pro = new Program();
            Console.WriteLine(pro.getCountChar(str, ch));
 
            //Console.ReadKey();
        }
        public int getCountChar(String s, char c){
         // 
 
            int num = 0;
            for (int i = 0; i < s.Length; ++i)
            {
                if (s[i] == c)
                {
                    num++;
                }
            }
            return num;
 
        // 
        }
    }
}