roundand

# Illustration (based on concepts in http://blogs.technet.com/b/heyscriptingguy/archive/2011/06/16/use-asynchronous-event-handling-in-powershell.aspx
#   and code nicked from an answer in http://social.technet.microsoft.com/Forums/en-US/96b339e2-e9da-4802-a66d-be619aeb21ac/execute-function-one-time-in-every-10-mins-in-windows-powershell 
#   )

#####
# 
# PASTE LINES BELOW INTO CONSOLE
#
#

roundand

<Query Kind="Statements">
  <Reference>&lt;RuntimeDirectory&gt;\System.Security.dll</Reference>
  <Namespace>System.Security.Cryptography.Xml</Namespace>
</Query>

// need to load System.Security via F4
XmlDocument myDoc = new XmlDocument();
myDoc.LoadXml("<root x='x' a='a'><trunk>etc</trunk></root>");
myDoc.OuterXml.Dump("Attributes in original document order");
XmlDsigC14NTransform t = new XmlDsigC14NTransform();

roundand

<Query Kind="Program" />

// define regex to match $-delimited tokens, eg $name$
static Regex toke = new Regex(@"\$(\w+)\$", RegexOptions.Compiled);

static void Main() 
{
    string input = @"Dear $name$, as of $date$ your balance is $amount$";
	var args = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
	args.Add("name", "Mr Smith");