C#

System.Web.HttpUtility.UrlDecode("Encoded%20String");

int[] i;  //declare an array of unknown size
i=new int[]{0,1,2,3,4,5}; //create an array from literals
i=GetArray(); //get an array from a function

using System.Collections;
...
array = new ArrayList();
 
// keep adding items to the ArrayList here.
 
int[] myArray = array.ToArray(typeof(int));

public int [] CreateArray(int size)
{
  int [] array = new int[size];
 
  return array;
}

public int[] CreateArray()
{
  string input = "";
  ArrayList alist = new ArrayList();
 
  Console.WriteLine("Enter a number then press enter, to quit just press enter");

  while("" != (input = Console.ReadLine()) )
  {
    int i;

    try
    {
      i = int.Parse(input);
    }
    catch
    {
      Console.WriteLine("\"{0}\" is not a valid input number, try again",
        input);
      continue;
    }
 
    alist.Add(i);
  }
 
  return (int[]) alist.ToArray(typeof(int));
}

[STAThread]
static void Main(string[] args) 
{
 try 
 {
  Form1 main = new Form1();
  main.Show();
 }
 catch (Exception ex)
 {
  MessageBox.Show(ex.ToString(), ex.Message);
 }
}

internal class Properties
{	
        [Category("Options"),
	Description("The color of the header on main form at top.")]
	public Color Color
	{
	        get{return _color;}
	        set{_color = value;}
	}
	[Category("Options"),
         Description("Some string used in the app.")]]
	public String String
	{
		get{return _s;}
		set{_s = value;}
	}
	private Color _color;
	private String _s;
}