Datagridview Cell Validating Event

Question

Hi EveryOne,

I have datagridview with some columns i designed design time,

no predefine data in my datagridview i want enter data at runtime,

its working fine i want to validate duplicate cell data at runtime

but here i used " private void DGV1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)"

in this event i used one property 

'e.formattedValue Is property" i want to remove that property data .

if anybody knows please replay me, 

Thanks in Advance.