#define code
#note this can also come from a file

$code = @"
using System;
public class HelloWorld
{
   public static string SayHello(string name)
   {
      return (String.Format("Hello there {0}", name));
   }
   public string GetLuckyNumber(string name)
   {
      Random random = new Random();
      int randomNumber = random.Next(0, 100);
      string message = String.Format("{0}, your lucky" +
                       " number for today is {1}", 
                       name, randomNumber);
      return message;
   }
}
"@

#add this code to current session
Add-Type -TypeDefinition $code

#call static method
[HelloWorld]::SayHello("belle")

#create instance
$instance = New-Object HelloWorld

#call instance method
$instance.GetLuckyNumber("belle")