System.Collections.IEnumerable

class MyList2<T> : IEnumerable<T> 
{ 
} 

MyList2<string> mylist; 
mylist = new MyList2<string>(); 
mylist.Add("Monday"); 
mylist.Add("Tuesday"); 

foreach (string s in mylist) 
{ 
   System.ConsoleWriteLine(s); 
} 

Generic Collection - IEnumerable<T>
Enumerating a generic collection class

System.Collections.Generic.List<string> mylist; 
mylist = new System.Collections.Generic.List<string>(); 
mylist.Add("Monday"); 
mylist.Add("Tuesday"); 

foreach (string s in mylist) 
{ 
   System.ConsoleWriteLine(s); 
}