C#

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void StupidFunction( SomeObject * o )
{
   delete o;
   o = null;
}

SomeObject * obj = new SomeObject();
StupidFunction( obj );
if( obj )
{
   obj->Bronk();
   delete obj;
}

using System;
 
class Test
{
  static void Main()
  {
    string value = "Hello, world!";
    Console.WriteLine(value);
 
    value.Replace("Hello", "Guten tag");
    Console.WriteLine(value); // still prints "Hello, world!"
 
    Change(ref value);
    Console.WriteLine(value);
  }
 
  static void Change(ref string value)
  {
    value = "Tschuss!";
  }
}

using System;
using System.Drawing;
using System.Windows.Forms;
 
class Test : Form
{
  static void Main()
  {
    Application.Run(new Test());
  }
 
  Test()
  {
    FormBorderStyle = FormBorderStyle.None;
    Bounds = Screen.FromControl(this).Bounds;
 
    Button btn = new Button();
    Controls.Add(btn);
    btn.Location = new Point(8, 8);
    btn.Text = "Close";
    btn.Click += new EventHandler(Close);
  }
 
  private void Close(object sender, EventArgs e)
  {
    Close();
  }
}
 

PrinterSettings printer = null;
foreach (string name in PrinterSettings.InstalledProperties)
{
  printer.PrinterName = name;
  if (printer.IsValid)
  {
    // Get your printer settings for each printer.
  }
}

using System;
using System.Management;
 
class Printers
{
  static void Main(string[] args)
  {
    EnumeratePrinters(args.Length > 0 ? args[0] : null);
  }
 
  static void EnumeratePrinters(string defaultName)
  {
    ManagementObject defaultPrinter = null;
    ManagementObjectSearcher searcher = new ManagementObjectSearcher(
      "select * from Win32_Printer");
    foreach (ManagementObject printer in searcher.Get())
    {
      string name = printer["Name"].ToString();
      Console.WriteLine("Printer: " + name);
      if (defaultName != null &&
        string.Compare(name, defaultName, true) == 0)
        defaultPrinter = printer;
    }
 
    if (defaultPrinter != null)
    {
      Console.WriteLine("Setting default printer to \"{0}\"",
        defaultPrinter["Name"]);
      defaultPrinter.InvokeMethod("SetDefaultPrinter", null);
    }      
  }
}