C# Parameter Passing example.(out, ref, normal passing)

ParameterPassing.cs

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

namespace TestProject
{
    class Program
    {
        static void Main(string[] args)
        {
            int nInt = 10;
            string nString = "I am a nString";

            Console.WriteLine(nInt);
            Console.WriteLine(nString);

            NormalFunction(nInt, nString);

            Console.WriteLine(nInt);
            Console.WriteLine(nString);

            Console.WriteLine("------");

            int oInt;
            string oString;

            //Console.WriteLine(oInt);
            //Console.WriteLine(oString);

            OutFunction(out oInt, out oString);

            Console.WriteLine(oInt);
            Console.WriteLine(oString);

            Console.WriteLine("------");

            int rInt = 30;
            String rString = "I am a rString";

            Console.WriteLine(rInt);
            Console.WriteLine(rString);

            RefFunction(ref rInt, ref rString);

            Console.WriteLine(rInt);
            Console.WriteLine(rString);

            Console.ReadLine();
        }

        static void NormalFunction(int i, string s)
        {
            i = 100;
            s = "I am a string from NormalFunction";
        }

        static void OutFunction(out int i, out string s)
        {
            i = 200;
            s = "I am a string from OutFunction";
        }

        static void RefFunction(ref int i, ref string s)
        {
            i = 300;
            s = "I am a string from RefFunction";
        }
    }
}