C#

public class Vector : INotifyPropertyChanged
{
  private int _x;
  private int _y;
  private int _z;
  
  public int X
  {
    get
    {
      return _x;
    }
    set
    {
      if (_x != value)
      {
        _x = value;
        Changed("X");
      }
    }
  }

  public int Y
  {
    get
    {
      return _y;
    }
    set
    {
      if (_y != value)
      {
        _y = value;
        Changed("Y");
      }
    }
  }

  public int Z
  {
    get
    {
      return _z;
    }
    set
    {
      if (_z != value)
      {
        _z = value;
        Changed("Z");
      }
    }
  }

  private void Set()
  {
    // Do some set work here... and rely on the property changed event
    // firing so the containing object can respond to items that have changed
    // as a result of the notification.
  }

  #region INotifyPropertyChanged Members
  private PropertyChangedEventHandler _propertyChanged;
  /// <summary>
  /// The event handler for the PropertyChanged event.
  /// </summary>
  public event PropertyChangedEventHandler PropertyChanged
  {
    add
    {
      _propertyChanged += value;
    }
    remove
    {
      _propertyChanged -= value;
    }
  }
  /// <summary>
  /// Called whenever a property changes, this method is invoked.
  /// </summary>
  /// <param name="propertyName">The name of the property that changed.</param>
  protected virtual void Changed(string propertyName)
  {
    Set();

    PropertyChangedEventHandler handler = _propertyChanged;
    if (handler != null)
    {
      handler(this, new PropertyChangedEventArgs(propertyName));
    }
  }
  #endregion
}

rich_wenger wrote:

FileInfo fi = new FileInfo(e.FullPath);
if (fi.Length > 524288000)// 500MB = 524288000