Need help in C# datepicker

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C#

can anyone tell me the datepicker value from datagridview is not showing in my datepicker

showing only the default date value (8/10/2013)

and even when updating the datepicker the value is shown in my
datagridvierw (example 10/12/2015) updated but onclick of mouseclick event the value is not showing instead of updated date it is showing the default date value

(8/10/2013)

gain
not showing updated one

What I have tried:

and even when updating the datepicker the value is shown in my 
datagridvierw (example 10/12/2015) updated  but onclick of mouseclick event the value is not showing instead of updated date it is showing the default date value <pre>(8/10/2013)

gain
not showing updated one