C# 泛型(方法)

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

namespace Examples
{
    class Simple                                            // Non-generic class
    {
        static public void ReverseAndPrint(T[] arr)     // Generic method
        {
            Array.Reverse(arr);
            foreach (T item in arr)                         // Use type argument T.
                Console.Write("{0}, ", item.ToString());
            Console.WriteLine("");
        }
    }

    class Program
    {
        static void Main()
        {
            // Create arrays of various types.
            var intArray = new int[] { 3, 5, 7, 9, 11 };
            var stringArray = new string[] { "first", "second", "third" };
            var doubleArray = new double[] { 3.567, 7.891, 2.345 };

            Simple.ReverseAndPrint(intArray);        // Invoke method
            Simple.ReverseAndPrint(intArray);             // Infer type and invoke

            Simple.ReverseAndPrint(stringArray);  // Invoke method
            Simple.ReverseAndPrint(stringArray);          // Infer type and invoke

            Simple.ReverseAndPrint(doubleArray);  // Invoke method
            Simple.ReverseAndPrint(doubleArray);          // Infer type and invoke
            Console.ReadLine();
        }
    }
}