How can I get all element values from Request.Form without specifying exactly which one with .GetValues(“ElementIdName”)

Currently using the below code to create a string array (elements) that contains all
string values from Request.Form.GetValues(“ElementIdName”), the problem is that in order for
this to work all my dropdown lists in my View have to have the same element ID name which
I don’t want them to for obvious reasons. So I am wondering if there’s any way for me to get
all the string values from Request.Form without explicitly specifying the element name. Ideally I would want to get all dropdown list values only, I am not too hot in C# but isn’t there some way to get all element ID’s starting with say “List” + “**”, so I could name my lists List1, List2, List3 etc.

C# UTC to Users Local Time

I have a site where users can make posts. The users can be from all over the globe so when they post, I am storing the posted date as DateTime.UtcNow. I am using the JQuery time ago plug in to show the posted dat similar to stack overflow (1 min ago etc…) But I am not sure how to convert to date I have stored in the system to the users local time? Here is what I am using: