c# 泛型的使用

未改造之泛型类：

using System;
using System.Collections;
using System.Diagnostics;

namespace ConsoleApp2

{

    class Store
    {
        private int[] arr = new int[100];
        public void Put(int v, int index) {
            arr[index] = v; 
        }
    }

    internal class Program
    {
        static void Main(string[] args)
        {
          
        }
    }
}

泛型之写法：

using System;
using System.Collections;
using System.Diagnostics;

namespace ConsoleApp2

{

    class Store<MyT>
    {
        private MyT[] arr = new MyT[100];
        public void Put(MyT v, int index) {
            arr[index] = v; 
        }
    }

    internal class Program
    {
        static void Main(string[] args)
        {
            Store<int> stor = new Store<int>();
          
        }
    }
}

泛型方法之写法：

using System;
using System.Collections;
using System.Diagnostics;

namespace ConsoleApp2

{

    class Store<MyT>
    {
        private MyT[] arr = new MyT[100];
        public void Put(MyT v, int index) {
            arr[index] = v; 
        }
    }

    internal class Program
    {
        static void Main(string[] args)
        {
            Store<int> stor = new Store<int>();

            //泛型的使用。
            int m = 10, n = 20;
            Swap<int>(ref m, ref n);
          
        }
        //泛型方法的写法
        static void Swap<T>(ref T a, ref T b) {
            T tmp = a;
            a = b;
            b = tmp;
        }
    }
}

泛型方法之写法 return 之报错：

using System;
using System.Collections;
using System.Diagnostics;

namespace ConsoleApp2

{

    class Store<MyT>
    {
        private MyT[] arr = new MyT[100];
        public void Put(MyT v, int index) {
            arr[index] = v; 
        }
    }

    internal class Program
    {
        static void Main(string[] args)
        {
            Store<int> stor = new Store<int>();

            //泛型的使用。
            int m = 10, n = 20;
            Swap<int>(ref m, ref n);
          
        }
        static void Swap<T>(ref T a, ref T b) {
            T tmp = a;
            a = b;
            b = tmp;
        }
        //求2个参数的相加
        static public T Ab<T>(T a, T b) {
            dynamic da = a;
            dynamic db = b;
            return  da + db;
        }
    }
}