C#

public XPathNodeIterator SelectSorted(XmlNode node, XmlNamespaceManager namespacemanager)
{
	XPathNavigator nav = node.CreateNavigator();
	XPathExpression xpathExpr = nav.Compile("xpath_expression");
	xpathExpr.SetContext(namespacemanager);
 
	xpathExpr.AddSort("sort_expression", XmlSortOrder.Ascending, XmlCaseOrder.None, String.Empty, XmlDataType.Text);
 
	return nav.Select(xpathExpr);
}

 An expression representing the sort key. This can be a string or
an XPathExpression object. The result of this expression is converted
to a string, according to the XPath specification, for comparison. In
an XSLT stylesheet, if xsl:sort is used, but no select expression is
specified, then string(.) is used by default.

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);
 }
}