How can I add an item to a ListBox in C# and WinForms?

I'm having trouble figuring out how to add items to a ListBox in WinForms.

I have tried:

list.DisplayMember = "clan";
list.ValueMember = sifOsoba;

How can I add ValueMember to the list with an int value and some text for the DisplayMember?

list.Items.add(?)

Btw. I can't use ListBoxItem for any reasons.

ListBoxItem is a WPF class, NOT a WinForms class.

For WPF, use ListBoxItem.

For WinForms, the item is a Object type, so use one of these:
1. Provide your own ToString() method for the Object type.
2. Use databinding with DisplayMemeber and ValueMember (see Kelsey's answer)

list.Items.add(new ListBoxItem("name", "value"));

The internal (default) data structure of the ListBox is the ListBoxItem.

In WinForms, ValueMember and DisplayMember are used when data-binding the list. If you're not data-binding, then you can add any arbitrary object as a ListItem.

The catch to that is that, in order to display the item, ToString() will be called on it. Thus, it is highly recommended that you only add objects to the ListBox where calling ToString() will result in meaningful output.

You might want to checkout this SO question:

C# - WinForms - What is the proper way to load up a ListBox?

DisplayMember and ValueMember are mostly only useful if you're databinding to objects that have those properties defined. You would then need to add an instance of that object.

e.g.:

public class MyObject
{
     public string clan { get; set; }
     public int sifOsoba { get; set; }
     public MyObject(string aClan, int aSif0soba)
     {
        this.clan = aClan;
        this.sif0soba = aSif0soba;
     }

     public override string ToString() { return this.clan; }
 }

 ....

 list.Items.Add(new MyObject("hello", 5));

If you're binding it manually then you can use the example provided by goggles