Generic 泛型

• <T>裡面可以放 型別(e.g：int、string、decimal、...等)或class的名稱或Interface的名稱

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Remoting.Messaging;
using System.Text;
using System.Threading.Tasks;

namespace GenericDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("****** GenericStringList ******");
            List<string> GenericStrings = new List<string>();
            GenericStrings.Add("1");
            GenericStrings.Add("2");
            GenericStrings.Add("3");

            for (int i = 0; i < GenericStrings.Count; i++)
            {
                Console.WriteLine(GenericStrings[i]);
            }

            Console.WriteLine("****** GenericIntList ******");
            List<int> GenericInts = new List<int>();
            GenericInts.Add(4);
            GenericInts.Add(5);
            GenericInts.Add(6);

            for (int i = 0; i < GenericInts.Count; i++)
            {
                Console.WriteLine(GenericInts[i]);
            }

            Console.WriteLine("****** GenericFunction ******");
            Calc(2, 5);
            Calc<int>(4, 6);

            Console.ReadLine();
        }

        public static void Calc<T>(T para1, T pars2)
        {
            #region 方法一
            //object a = para1;
            //object b = pars2;
            //Console.WriteLine((int)a + (int)b);
            #endregion

            #region 方法二
            Console.WriteLine(Convert.ToInt32(para1) + Convert.ToInt32(pars2));
            #endregion
        }
    }
}