I am still pretty much new to c# so you will have to bear with me.
I have developed a windows form program which updates some SQL records as an end of day process fo
If it is a windows application, just go to the bin folder, get the executable file, and finally schedule a task for it by using windows schedule task and choose the exe file as you targeted application.
if it is web application, you may want to include your code in a quartz.net scheduled job, details are on quartz.net website.