Printing out the contents of a string collection

stringCollectionDump.cs

using System.IO;
using System;
using System.Linq;

class Program
{
    
    enum enumConversionChoice
    {
          convertToStringArray
        , convertToIEnumerable  
    };
    
    static void Main()
    {
        
        Console.WriteLine
          (
              prepareFilelistUsingStringCollectionConverted
              (
                  enumConversionChoice.convertToStringArray
              )
          );
          
       Console.WriteLine("");
       Console.WriteLine("");
        
       Console.WriteLine
          (
              prepareFilelistUsingStringCollectionConverted
              (
                  enumConversionChoice.convertToIEnumerable
              )
          );   
          
    }
    

 
    private static String prepareFilelistUsingStringCollectionConverted
    (
        enumConversionChoice choice
    )
    {
     
         String strListofFileNames = "";
     
         System.Collections.Specialized.StringCollection objListofFiles
            = new  System.Collections.Specialized.StringCollection();
     
     
        objListofFiles.Add("file -01");
        
        objListofFiles.Add("file -02");
     
        if (choice == enumConversionChoice.convertToStringArray)
        {
         
            string[] strArray;
     
            strArray = new string[objListofFiles.Count];
     
            objListofFiles.CopyTo(strArray,0);
     
            strListofFileNames 
               = string.Join
                  (
                     System.Environment.NewLine 
                    , strArray
                 );
 
       }   
       else if (choice == enumConversionChoice.convertToIEnumerable)
       {
         
            System.Collections.Generic.List<string> listString = null;
 
           listString = objListofFiles.Cast<String>().ToList();
     
           strListofFileNames
            = string.Join
              (
                   System.Environment.NewLine 
                 , listString
              );
 
       }   
         
       return (strListofFileNames);
     
    }
    
}