NavigationAsyncResult

/// <summary>
    /// An IAsyncResult to be used with INavigationContentLoaders
    /// </summary>
    public class NavigationAsyncResult : IAsyncResult
    {

        /// <summary>
        /// The content of the navigation.
        /// This will be created by BeginLoad and returned by EndLoad
        /// </summary>
        public object Content { get; set; }

        /// <summary>
        /// Keeps track of whether or not this operation has been cancelled.
        /// </summary>
        public bool Cancelled { get; set; }

        /// <summary>
        /// Marks this Async operation as complete
        /// </summary>
        public void Complete()
        {
            IsCompleted = true;
            (AsyncWaitHandle as AutoResetEvent).Set();
        }

        /// <summary>
        /// Tracks an Exception that may have occured during processing.
        /// </summary>
        public Exception Error { get; set; }

        /// <summary>
        /// Creates a new NavigationAsyncResult
        /// </summary>
        /// <param name="asyncState">A user-defined object that qualifies or contains information about an asynchronous operation.</param>
        public NavigationAsyncResult(object asyncState)
        {
            AsyncState = asyncState;
            AsyncWaitHandle = new AutoResetEvent(false);
            CompletedSynchronously = false;
            IsCompleted = false;
            Cancelled = false;
        }

        #region IAsyncResult Members
        /// <summary>
        /// Gets a user-defined object that qualifies or contains information about an asynchronous operation.
        /// </summary>
        public object AsyncState { get; private set; }

        /// <summary>
        /// A wait handle that is used to wait for an asynchronous operation to complete.
        /// </summary>
        public WaitHandle AsyncWaitHandle { get; private set; }

        /// <summary>
        /// Gets a value that indicates whether the asynchronous operation completed synchronously.
        /// </summary>
        public bool CompletedSynchronously { get; set; }

        /// <summary>
        /// Gets a value that indicates whether the asynchronous operation has completed.
        /// </summary>
        public bool IsCompleted { get; private set; }

        #endregion
    }