| A1:
                         | 
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| A2:
                         | Simple binding occurs on a control that displays a single value; complex binding associates a control with a collection of data in a data source. In one-way data binding, the control is bound to the source for read-only purposes. Changes to the control's value are not reflected in the data source. Two-way binding permits the data source to be updated by changing the control's value(s).  | 
| A3:
                         | The properties on a custom data source that expose the bound data must be writable, so the object can be updated.  | 
| A4:
                         | 
DataGridView.SelectionMode =
  DataGridViewSelectionMode.FullRowSelect;
 
  | 
| A5:
                         | A ListBox cannot be included in a DataGridView cell. Other controls that can be included are a Link, CheckBox, and Image.  | 
| A6:
                         | To freeze a column, set the column's Frozen property to TRue. The column and all to its left remain visible during scrolling. 
dgv.Columns[1].Frozen=true;
 
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