example of arraylist in c#

Example 1: csharp create array list

ArrayList a1 = new ArrayList();
a1.Add(1);

Example 2: arraylist in C#/

using System.Collections;

ArrayList arlist = new ArrayList(); 
// or 
var arlist = new ArrayList(); // recommended

Example 3: arraylist in C#

var arlist1 = new ArrayList();

var arlist2 = new ArrayList()
                    {
                        1, "Bill", " ", true, 4.5, null
                    };

int[] arr = { 100, 200, 300, 400 };

Queue myQ = new Queue();
myQ.Enqueue("Hello");
myQ.Enqueue("World!");

arlist1.AddRange(arlist2); //adding arraylist in arraylist 
arlist1.AddRange(arr); //adding array in arraylist 
arlist1.AddRange(myQ); //adding Queue in arraylist