Simple question please ....

Enclose your code in the loop as below:
String Continue;

do
{
        Console.WriteLine("Current Timestamp:"+DateTime.Now.ToString());
        //Place your value insertion code instead of above statement
        //Press N to stop the process. otherwise loop thru.
        Console.WriteLine("Do you want to continue? (Y/N)");
        Continue=Console.ReadLine();
 }
while(Continue.ToUpper()!="N");