Hi All,

I have 2 Class, Value_ and Student also Form1 code.

My problem is how to call "Class Student" with Button_3 click in Form1.


Class Student
==================

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

namespace Fun_
{
    class Student
    {
        String name;
        public Student(String name)
        {
            this.name = name;
        }
        override public string ToString()
        {
            return name;
        }
    }

    static public Student Highest(Student o1, Student o2)
    {
        if (o1.ToString().CompareTo(o2.ToString()) > 0)
            return o1;
        else
            return o2;
    }


}

Class Value_
===============


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

namespace Fun_
{
    class Value_
    {
        static public int Highest(int o1, int o2)
        {
            if (o1 > o2)
                return o1;
            else
                return o2;
        }

        static public Double Highest(Double o1, Double o2)
        {
            if (o1 > o2)
                return o1;
            else
                return o2;
        }

    }
}



Form1 code
===========


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Fun_
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int o1 = 1;
            int o2 = 2;

            listBox1.Items.Add("Highest   =" + Value_.Highest(o1, o2));

        }

        private void button2_Click(object sender, EventArgs e)
        {
            Double o1 = 6;
            Double o2 = 1;

            listBox2.Items.Add("Highest   =" + Value_.Highest(o1, o2));

        }
        private void button3_Click(object sender, EventArgs e)
        {
            Student s1 = new Student("Chong");
            Student s2 = new Student("wei");
            listBox2.Items.Add("Highest  =" + Student.Highest(s1, s2));


        }

 
    }
}