C# - How To Get Date And Time Formats Based On Culture Infomation

What I want is..If culture is en-US then

string dateFormat="MM/dd/yyyy";
string timeFormat="24.00 hrs";

If culture is en-GB then string dateFormat="dd/mmyyyy";
string timeFormat="24.00 hrs";

and so on for other countries..Now how do I get these date and time format values ? What are the standards? Like which all countries use similar date/time formats and which ones don't ?ok I tried this :- DateTime myDate = new DateTime();
string us = myDate.ToString(new CultureInfo("en-US"));

string us gets value =1/1/0001 12:00:00 AM

Now how do I extract "dd/mm/yyyy" and "24.00 hrs" out of this...in my Dateformat column in my Table... I want to store STRINGS such as dd/mm/yyyy or mm/dd/yyyy NOT dates..In my TimeFormat column in the table, the values to be stores are STRINGS too, like I need to store either "24:00hrs" or "12:00hrs"

How do I do this now ?**using ShorTimePattern returns these values as h:mm tt and HH:mm

If I want to store the values in my DB exactly as "24:00hrs" and "12:00hrs", how do I use these values..h:mm tt and HH:mm,which one is for 24 hr format and which for 12 hr format ?**I want the information about Decimal Separator and Thousand Separator too based on the CultureInfo...whats the property for that ?