ListBox does not show all items

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C#

WPF

Hi guys,

i was working on a simple task to show some strings to the listbox.
The problem is; if i add 5 items(string) to the listbox, it shows the 1st added item in 5 rows. I want it to show all the added items.

Below is my code:

for (int i = 1; i <= 5; i++)
{
   for (int i = 0; i < 7; i++)
   {
      int iDraw = randomNum.Next(1, 1000000);
      ListNumContainer.Add(iDraw);
   }
   for(int i = 0; i < ListNumContainer.Count; i++)
   {
        strBlder.AppendFormat(Convert.ToString(ListNumContainer[i]));
        if(i!=5)
          strBlder.Append("-");
   }
   listBox.Items.Add(strBlder);
}

The ListNumberContainer contains some int and will be appended to the stringbuilder before added to the listBox.

Is there anything which i have missed out?
And what is the difference between ListBox,ListBoxItem,ListView and ListViewItem?

Thanks,
Skunkhead :)