C#

// Somewhere in your constructor or some other
// initialization method call CacheFile with the appropriate key
private const string KEY1 = "File1.txt";
private const string KEY2 = "File2.txt";
private void CacheFile(string key)
{
  if (key == null) throw new ArgumentNullException("key");
  if (key.Length == 0) throw new ArgumentException("Invalid key.");
  if (Cache[key] == null)
  {
    string path = Server.MapPath("/docs/" + key);
    using (StreamReader reader = new StreamReader(path))
    {
      Cache.Add(
        key,
        reader.ReadToEnd(),
        new CacheDependency(path),
        Cache.NoAbsoluteExpiration,
        Cache.NoSlidingExpiration,
        CacheItemPriority.AboveNormal,
        new CacheItemRemovedCallback(CacheItemRemoved));
    }
  }
}
private void CacheItemRemoved(string key, object value,
  CacheItemRemovedReason reason)
{
  if (key == KEY1) CacheFile(KEY1);
  else if (key == KEY2) CacheFile(KEY2);
  // else: must've been something else - the point is to check the 'key'
}
public string File1Content
{
  get
  {
    CacheFile(KEY1);
    return Cache[KEY1];
  }
}
public string File2Content
{
  get
  {
    CacheFile(KEY2);
    return Cache[KEY2];
  }
}

for ( ; i < Controls.Count; i++)
{
  Label lbl = Controls[i] as Label;
  // ...
}

private int i = 0;

string type = 
  ConfigurationSettings.AppSettings["authenticator"];
if (type == null)
  type = "MyNamespace.MyAccessAuthClass, MyAssembly, " +
    "Version=1.0.0.0, Culture=neutral, PublicKeyToken=0123456789abcdef"
AuthenticatorBase auth = null;
try
{
  Type t = Type.GetType(type);
  auth = (AuthenticatorBase)Activator.CreateInstance(t);
}
catch (Exception ex)
{
  MessageBox.Show("Could not create the authentication package: " + ex.Message,
    "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
  Environment.Exit(1);
}
// Authenticate using the auth variable