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Dear all, I'm starting on C# now. I had a problem in tackling a question my lecturer asked me to do. Below is the GUI.

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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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            double num1;
            double num2;
            double answer;

            num1 = double.Parse(textBox1.Text);
            num2 = double.Parse(textBox2.Text);


            textBox4.Text = Convert.ToString(answer);
        }
    }
}

I will need to add/subtract/multiple/divide first and second number so that it will produce --> (first number + the operation + second number = the answer).

The problem is i need to select the operation by clicking on the + , - , * , / symbols on the textbox. I could do it easily by using radio button or etc but my lecturer insist on this format. Please do assist for the coding of "operation" selection. Thank you.

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