Simple Asynchronous Background Task Processing with Progress Dialog (Silverlight Solution)

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace AsyncOperation
{
    //This tasks gets a delegate that will be called on running.
    internal class DelegateTask<TP> : TaskBase<TP> where TP : DefaultProgressDlg, new()
    {
        private Action<TP> _taskRun;
        private bool _isCancellable;

        public DelegateTask(Action<TP> taskRun) : this(taskRun, false)
        {
        }

        public DelegateTask(Action<TP> taskRun, bool isCancellable)
        {
            _taskRun = taskRun;
            _isCancellable = isCancellable;
        }

        protected override bool IsCancellable
        {
            get { return _isCancellable; }
        }

        protected override void Run()
        {
            _taskRun(this.ProgressDialog);
        }
    }
}