C# 6: ListBox

MultiColumn = True
- Listbox display in multiple columns and a horizaontal toolbar

MultiColumn = False
- Listbox display in single column and vertical toolbar

listBox1.SelectionMode = SelectionMode.MultiExtended;
listBox1.SelectionMode = SelectionMode.MultiSimple;
listBox1.SelectionMode = SelectionMode.None;
listBox1.SelectionMode = SelectionMode.One;

http://msdn.microsoft.com/en-us/library/system.windows.forms.listbox.selectedindex(VS.71).aspx

.Datasource
.DisplayMember