.net - storing 3 arraylist into one list in asp.net/c# -

I have array with string element and store me To do so, call them a list / array list / string arrays / in dictionary

my Meaning I want to add them. I do not know how can I do it? What should I use?

It is in asp.net/c #

Please help me!

Thank you in anticipation! Just create a new ArrayList and add each existing ArrayList using AddRange ():

  System.Collections.ArrayList A = {"Hello", "World"}; System compilation. Arrayistist = {"Second", "Array"}; System Selection.Aralyst newlive = new system.collection.release (); NewList.AddRange (a); NewList.AddRange (two);   
 You will have all items in the new list  
  {"hello", "world", "second", "array"}