The class below provides a progress model for reporting the progress of an action.

/// <summary>
/// Provides a progress class for reporting progress data.
/// </summary>
/// <typeparam name="T">The type used for the result data.</typeparam>
public class ProgressModel<T>
{
    /// <summary>
    /// Gets the results queue.
    /// </summary>
    public Queue<T> Results { get; private set; }

    /// <summary>
    /// Gets the message queue.
    /// </summary>
    public Queue<string> Messages { get; private set; }

    /// <summary>
    /// Gets or sets a value indicating whether this instance is completed.
    /// </summary>
    public bool IsComplete { get; set; }

    /// <summary>
    /// Flags the response model as canceled.
    /// </summary>
    public void Cancel()
    {
        this.IsCanceled = true;
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="ProgressModel{T}"/> class.
    /// </summary>
    public ProgressModel()
    {
        this.Results = new Queue<T>();
        this.Messages = new Queue<string>();
    }

    /// <summary>
    /// Gets a value indicating whether this instance is canceled.
    /// </summary>
    public bool IsCanceled { get; private set; }

    /// <summary>
    /// Gets or sets the progress.
    /// </summary>
    public float Progress { get; set; }

    /// <summary>
    /// Gets or sets the information that may have been thrown.
    /// </summary>
    public Exception Exception { get; set; }

    /// <summary>
    /// Gets a value indicating whether this instance is faulted.
    /// </summary>
    public bool IsFaulted
    {
        get
        {
            return this.Exception != null;
        }
    }

    /// <summary>
    /// Gets or sets the title.
    /// </summary>
    public string Title { get; set; }   
}