How automatically calculate days then delete files c#?

Question

Hello everyone,

 

I have this table structure.

 

 

Then, I am showing these items inside listview if archivedname is exist. After clicking a button, then there should a popup window will show as shown below.

 

 

 With respect to this pop-up, after add number of days, then want to delete automatically archived name containing each record from listview or database table older than give number days.

 

For example, if I am giving 90 days then click button, should delete all files after 90days from current date. 

 

How can I set automatic scheduler c# code?

 

Please help me.