Object类的用法（二）-优快云博客

本文通过一个C#示例详细介绍了如何使用Equals方法来比较两个Int32类型的实例是否相等，并展示了不同情况下比较的结果。同时，还对比了Equals方法、object.Equals静态方法以及==操作符的区别。

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using System;
using System.Collections.Generic;
using System.Text;

namespace Object.Equals_方法
{
    class Program
    {
        static void Main(string[] args)
        {
            //public override bool Equals (
            //Object obj
            //)
            //如果 obj 是 Int32 的实例并且等于此实例的值，则为 true；否则为 false。

Int32 myVariable1 = 60;
Int32 myVariable2 = 60;

//Int16 myVariable2 = 60;//此时打印和上面一样

//Int64 myVariable2 = 60;//此时不一样

            // Get and display the declaring type.
            Console.WriteLine("\nType of 'myVariable1' is '{0}' and" +
                 " value is :{1}", myVariable1.GetType(), myVariable1);
            Console.WriteLine("Type of 'myVariable2' is '{0}' and" +
                 " value is :{1}", myVariable2.GetType(), myVariable2);

            // Compare 'myVariable1' instance with 'myVariable2' Object.
            if (myVariable1.Equals(myVariable2))
                Console.WriteLine("\nStructures 'myVariable1' and " +
                      "'myVariable2' are equal");
            else
                Console.WriteLine("\nStructures 'myVariable1' and " +
                      "'myVariable2' are not equal");

            if(object.Equals(myVariable1,myVariable2))
                Console.WriteLine("\nStructures 'myVariable1' and " +
                      "'myVariable2' are equal");
            else
                Console.WriteLine("\nStructures 'myVariable1' and " +
                      "'myVariable2' are not equal");

            Console.WriteLine(myVariable1 == myVariable2);//但自定义的结构类型，不能用==进行比较，而自定义的类可以用==进行比较


            if(ReferenceEquals(myVariable1,myVariable1))
                Console.WriteLine("\nStructures 'myVariable1' and " +
                      "'myVariable2' are equal");
            else
                Console.WriteLine("\nStructures 'myVariable1' and " +
                      "'myVariable2' are not equal");

            Console.ReadKey();
        }
    }
}