Output sequence of Enum in c#

Here is my enum with which i am just confused with output. Please explain its execution sequence.

 

public enum DayofWeek
{
  Monday=1,Tuesday,Wednesday=1,Thursday,Friday=2,Saturday
}

 

static void Main(string[] args)
{

  string[] values = Enum.GetNames(typeof(DayofWeek));

foreach (string s in values)
{

  Console.WriteLine(s);

}
}