Hello @Jayakiruba_Sekar ,
Use something like this in order to add a week to a date:
yourDateTimeVar.AddDays(7)
For two weeks you could use:
yourDateTimeVar.AddDays(14)
More info here: https://learn.microsoft.com/en-us/dotnet/api/system.datetime.adddays?view=net-7.0
Hope it helps!
Best regards,
Marius