Add a userdefined object to listbox

To add your own object to a listbox is quite simple, for those who don't know how to do it, I would like to share that short instruction. :)
It's useful for example if we need the possibility to add more or userdefined properties or objects like a Tag, an Image or something else to the Listbox Item.

First, we need to create our own object class:

public class ListBoxItem:Object
{
    public virtual string Text { get; set; }
    public virtual object Tag { get; set; }
    public virtual object Object { get; set; }
    public virtual string Name { get; set; }

    /// <summary>
    /// Class Constructor
    /// </summary>
    public ListBoxItem()
    {
        this.Text = string.Empty;
        this.Tag = null;
        this.Name = string.Empty;
        this.Object = null;
    }

    /// <summary>
    /// Overloaded Class Constructor
    /// </summary>
    /// <param name="Text">Object Text</param>
    /// <param name="Name">Object Name</param>
    /// <param name="Tag">Object Tag</param>
    /// <param name="Object">Object</param>
    public ListBoxItem(string Text, string Name, object Tag, object Object)
    {
        this.Text = Text;
        this.Tag = Tag;
        this.Name = Name;
        this.Object = Object;
    }

    /// <summary>
    /// Overloaded Class Constructor
    /// </summary>
    /// <param name="Object">Object</param>
    public ListBoxItem(object Object)
    {
        this.Text = Object.ToString();
        this.Name = Object.ToString();
        this.Object = Object;
    }

    /// <summary>
    /// Overridden ToString() Method
    /// </summary>
    /// <returns>Object Text</returns>
    public override string ToString()
    {
        return this.Text;
    }
}

Override the ToString() method!
Otherwise the Text will not be displayed in the Listbox.

Basically, we only need the userdefined Properties and the ToString() Method.

To use the new userdefined object, we add new instances of the user class to the listbox, here we add 10 auto-generated entries using a for-loop:

for (int i = 0; i < 10; i++)
{
    ListBoxItem test = new ListBoxItem();
    test.Text = "Objekt " + i;
    test.Name = "Ich heiße Objekt " + i;
    test.Tag = DateTime.Now;
    listBox1.Items.Add(test);
}

To get the listbox items back, we convert the listbox item to our user class:

ListBoxItem item = (ListBoxItem)listBox1.SelectedItem;

string s = "Text:\t" + item.Text
    + "\nName:\t" + item.Name
    + "\nTag:\t" + item.Tag.ToString();

MessageBox.Show(s, item.ToString());

Another example, used by many books...
Add a car manufacturer, model and color to a listbox:

First, we need the Type (Class) "Car":

public class Car:Object
{
    public virtual string Manufacturer { get; set; }
    public virtual string Model { get; set; }
    public virtual System.Drawing.Color Color { get; set; }

    /// <summary>
    /// New class instance
    /// </summary>
    /// <param name="Hersteller"></param>
    /// <param name="Modell"></param>
    /// <param name="Farbe"></param>
    public Car(string Manufacturer, string Model, System.Drawing.Color Color)
    {
        this.Manufacturer = Manufacturer;
        this.Model = Model;
        this.Color = Color;
    }

    /// <summary>
    /// Overridden ToString() Method
    /// </summary>
    /// <returns>Object Text</returns>
    public override string ToString()
    {
        return string.Format("{0} {1}, {2}",
            this.Manufacturer, this.Model, this.Color);
    }
}

To add new cars to the ListBox:

Car car = new Car("BMW", "530i", System.Drawing.Color.Blue);
listBox1.Items.Add(car);
car = new Car("Audi", "TT", System.Drawing.Color.Black);
listBox1.Items.Add(car);
car = new Car("VW", "Golf", System.Drawing.Color.Red);
listBox1.Items.Add(car);
car = new Car("Mercedes", "230E", System.Drawing.Color.White);
listBox1.Items.Add(car);

To get the object "Car" back:

Car car = (Car)listBox1.SelectedItem;
MessageBox.Show(car.ToString(), "Car Info");