how to convert string into datetime formatt?

thanks but not solved my problem , a have a callender controle ,am selecting date in callender ,while am calling thease date as a string because json retuns date in defferent formatts so insted of that i just declared that as a string am getting the date from callender like 11/02/2016 its clearly string formatt,but i want call a proc with date column datatype is datetime .so please tell me how can i pass thease varble

thanks but not solved my problem , a have a callender controle ,am selecting date in callender ,while am calling thease date as a string because json retuns date in defferent formatts so insted of that i just declared that as a string am getting the date from callender like 11/02/2016 its clearly string formatt,but i want call a proc with date column datatype is datetime .so please tell me how can i pass thease varble

DateTime.ParseExact() Method