using System.Collections;
using System.Collections.Generic;
public static void Main()
IEnumerable<string> emptyCollection = new List<string>();
IEnumerable<string> populatedCollection = new List<string>{"0092YX-E","0016YD-E","000C7F-E","004GFQ-E","081DJS-E","0035K2-E","BAC-US","PEBO-US","DUMMY"};
foreach (var item in populatedCollection)
emptyCollection.Append(item);
foreach (var item in emptyCollection)