public FormItemCollection()
{
InitializeComponent();
buttonNewColumn.Click += (sender, e) => AddItem.RaiseEventEx(this);
addColumnToolStripMenuItem.Click += (sender, e) => AddItem.RaiseEventEx(this);
removeColumnToolStripMenuItem.Click += (sender, e) => RemoveItem.RaiseEventEx(this);
listBoxItems.SelectedIndexChanged += (sender, e) => SelectedItemChanged.RaiseEventEx(this);
}
