C#

protected void Application_Start(object sender, EventArgs e)
{
  // While the cache is a singleton, you can still only get it from the
  // current request context.
  HttpContext current = HttpContext.Current;
  if (current != null)
  {
    Cache cache = current.Cache;
    XmlDocument doc = cache["MyStuff"];
    if (doc == null)
    {
      // Not cached (or has been invalidated) - reload it.
      doc = new XmlDocument();
      string path = Server.MapPath("/data/mystuff.xml");
      doc.Load(path);
      cache.Add("MyStuff", doc, new CacheDependency(path),
        Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration,
        CacheItemPriority.High, null);
    }
    // Do something with "doc" now.
  }
}

public class MyWebControl : WebControl
{
  // ...
  // Just don't use the Width in your code anywhere when you render.
  [Browsable(false)]
  [EditorBrowsable(EditorBrowsableState.Never)]
  public override Unit Width
  {
    get { return base.Width; }
    set { base.Width = value; }
  }
}

static void Main()

try
{
    // Your code here.
}
catch (Exception err)
{
    System.Diagnostics.Trace.WriteLine(err.ToString());
}