IEnumerable Interface

Question

Suppose I have one list of strings in my main method. I can use foreach loop with lstMonth directly.

static void Main(string[] args)

{

List<string> lstMonth = new List<string>();

Month.Add("January");

Month.Add("February");

Month.Add("March");

Month.Add("April");

Month.Add("May");

Month.Add("June");

Month.Add("July");

Month.Add("August");

Month.Add("September");

Month.Add("October");

Month.Add("November");

Month.Add("December");

// First Loop

foreach(string str1 in lstMonth)

{

Console.WriteLine(str1);

}

}

Another method for reiterating through lstMonth is as below

IEnumerable<string> iEnumerableOfString = (IEnumerable<string>)Month;

// Second Loop

foreach(string AllMonths in iEnumerableOfString)

{

Console.WriteLine(AllMonths);

}

Reference Link : https://www.c-sharpcorner.com/UploadFile/219d4d/ienumerable-vs-ienumerator-in-C-Sharp/

Question: What is the difference between foreach loop of list of strings (First Loop) vs IEnumerable (Second Loop) ?

Do we get any advantage if we use second loop in terms of performance or any other ways ? If yes then please mention those ?

If no then why should we use it?