Question

I keep getting this error when making the program as given below:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace simplecalc
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            int a, b, c;
            a = int.Parse(textBox1.Text);
            b = int.Parse(textBox2.Text);
            if (rbadd.Checked == true)
                c = a + b;
            else if (rbsubtract.Checked == true)
                c = a - b;
            else if (rbdivide.Checked == true)
                c = a / b;
            else
                c = a * b;
            textBox3.Text = c.ToString();
        }
    }
}

I am in the process of making a basic calculator in C# in WPF. I am very new to C#.

Answer 1

Checked here is an event, not a bool, that happens when it is checked. You need a different property – presumably IsChecked.

Minor note, but stylistically, it is usually preferable not to compare booleans to true/false, but rather:

        if (rbadd.IsChecked)
            c = a + b;
        else if (rbsubtract.IsChecked)
            c = a - b;
        else if (rbdivide.IsChecked)
            c = a / b;

etc; or if you wanted to test for false: if(!rbadd.IsChecked).