datetime issue

as we know that DATETIME2 format stores data in this format: "YYYY-MM-DD HH-MM-SS"

e.g. 

9999-12-31 23:59:59

but i want to store them in this format : MM-DD-YYYY HH-MM-SS, via asp.net 

how ?

i am tired of trying , tried alot but :(

NOTE: I am using ajax calender extender and time picker and then concatentating both to pass them to DATETIME field in DB.