Here Mudassar Ahmed Khan has explained with an example, how to select (check) one (single) CheckBox in Windows Forms DataGridView using C# and VB.Net.
By default, multiple CheckBoxes in DataGridView are meant for multiple selection, thus in order to make it work as single selection i.e. only one (single) CheckBox can be selected at a time, when one CheckBox is checked, all the other CheckBoxes must be unchecked.
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