C# Code for Arthimatic Calculation by Taking 3 Operands Using Properties Concept -I

/// D.A.Applic_ of Arthimatic Calculation by Taking 3 Operands Using Properties Concept.  
Conditions: 
Operand1 & Operand2 are Wrie-Only Property whereas Operand3 is Read-Only Property
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Property_Calulator1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

         //Property Fields         
        private int _operand1;
        private int _operand2;
        private int _result;
        
        //Properties
        public int Operand1
        {
            set { _operand1 = value; }
        }
        public int Operand2
        {
            set { _operand2 = value; }
        }
        public int Result
        {
            set { _result = value; }
            get { return _result; }
        }

        private void btn_SetValues_Click(object sender, EventArgs e)
        {
            Operand1 = int.Parse(txt_oper1.Text); 
//_operand1 = int.Parse(txt_oper1.Text);
            Operand2 = int.Parse(txt_oper2.Text); 
//_operand2 = int.Parse(txt_oper2.Text);        
        }

        private void btn_GetValue_Click(object sender, EventArgs e)
        {
            txt_result.Text = Result.ToString(); 
//txt_result.Text = obj.Result.ToString();
        }

        private void btn_Plus_Click(object sender, EventArgs e)
        {
            Result = _operand1 + _operand2;//Result = Operand1 + Operand2;
            btn_GetValue.Enabled = true;
        }

        private void btn_Subtact_Click(object sender, EventArgs e)
        {
            Result = _operand1 - _operand2;//Result = Operand1 - Operand2;
            btn_GetValue.Enabled = true;
        }

        private void btn_Multiply_Click(object sender, EventArgs e)
        {
            Result = _operand1 * _operand2;//Result = Operand1 * Operand2;
            btn_GetValue.Enabled = true;
        }

        private void btn_Division_Click(object sender, EventArgs e)
        {
            int b = int.Parse(txt_oper2.Text);
            if (b != 0)
            {
                Result = _operand1 / _operand2;//Result = Operand1 / Operand2;
                btn_GetValue.Enabled = true;
            }
            else
                MessageBox.Show("Operand2 must not be zero");
        }        
    }
}