Basic Skype Manager for C#

gistfile1.cs

public delegate void SkypeIncomingCall(string user_id);

public class SkypeManager
{
    /// <summary>
    /// The ActiveX component to control the current
    /// running instance of Skype.
    /// </summary>
    private Skype _skype;

    /// <summary>
    /// This flag indicates if the last call to the
    /// ActiveX component was ok.
    /// </summary>
    private bool _attached;

    /// <summary>
    /// Occurs when a user starts a call with the
    /// user ho started the current running Skype
    /// instance.
    /// </summary>
    public event SkypeIncomingCall IncomingCall;

    /// <summary>
    /// Creates a new instance of <see cref="SkypeManager"/>,
    /// which means that it would connect to the current
    /// running Skpye instance.
    /// </summary>
    /// <exception cref="SkypeInstanceNotFoundException">Thrown
    /// when there was imposible to connect to the current
    /// running Skpype instance.</exception>
    public SkypeManager()
    {
        _attached = false;
        try
        {
            // Construct skype
            _skype = new Skype();

            // Make a call that needs to connect
            // to the running isntance of skype
            // to ensure the manager can interact
            // with it.
            UserCollection friends = _skype.Friends;

            // All gone ok.
            _attached = true;
        }
        catch (Exception ex)
        {
            CatchGeneralException(ex, "Constructor");
        }
    }
 }