Question

I am following a tutorial to create a class:

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 Session3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Vehicle my_Car = new Vehicle;
        }
    }
    class Vehicle
    {
        uint mileage;
        byte year;
    }
}

I am getting the mentioned error on this line:

private void button1_Click(object sender, EventArgs e)
{
    Vehicle my_Car = new Vehicle;
}

Does anyone know what I am doing wrong?

Answer 1

Use

Vehicle my_Car = new Vehicle();

To call a constructor you need () after the class name, just like for function calls.

One of the following is required:

• () for a constructor call. e.g. new Vehicle() or new Vehicle(...)
• {} as an initializer, e.g. new Vehicle { year = 2010, mileage = 10000}
• [] for arrays, e.g. new int[3], new int[]{1, 2, 3} or even just new []{1, 2, 3}