uncheck all in a CheckedListBox

[Aamir]

what is the shortest way to uncheck all the checked items in a
CheckedListBox.
I have coded a method as follows that takes the CheckedListBox and the
CheckedItems collection as arguments and loops through the collection
TRY's to uncheck the checked items with two ways, the first one fails
with some error and the second one does not uncheck anything.

the method is called from othe part of program as follows:
:
:
ResetList(MyChe ckedListBox , MyCheckedListBo x.CheckedItems) ;
:
:

//method definition
private void ResetList(Check edListBox lst, IList col)
{
//Try either this loop. This one ends with runtime error
foreach( Object obj in col)
{
lst.SetItemChec ked(col.IndexOf (obj), false);
}

//********* OR ***********

//Try this loop. This one doesn't work
for(int i=0; i<col.Count; i++)
{
lst.SetItemChec ked(col.IndexOf (col[i]), false);
}

}