((DateTime)dtArrayToPickFromDB[0]).ToShortDateString()

((DateTime)dtArrayToPickFromDB[0]).ToShortDateString() how can i make it empty in i开发者_C百科mmediate window of the Asp.net

You're inspecting the return value from a method call (ToShortDateString()), so you cannot edit the value shown in the immediate window. This is only possible for fields and properties.