Utility class to simplify tasks usage on Windows Phone 7/8

TaskHelper.cs

using Microsoft.Phone.Tasks;
using System;

namespace Tools
{
    public abstract class TaskHelper
    {
        /// <summary>
        /// Launch a share task
        /// </summary>
        /// <param name="message">Message to share</param>
        public static void ShareTask(string message)
        {
            ShareStatusTask shareTask = new ShareStatusTask();
            shareTask.Status = message + " - via MyApp";
            shareTask.Show();
        }

        public static void MailTask(string receiver, string subject)
        {
            var emailComposeTask = new EmailComposeTask
            {
                To = receiver,
                Subject = subject
            };

            emailComposeTask.Show();
        }

        public static void MarketPlaceMarkTask()
        {
            MarketplaceReviewTask marketplaceReviewTask = new MarketplaceReviewTask();
            marketplaceReviewTask.Show();
        }

        public static void BrowserTask(string uri)
        {
            WebBrowserTask task = new WebBrowserTask();
            task.Uri = new Uri(uri, UriKind.Absolute);
            task.Show();
        }
    }
}