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             ControlHelpers.cs
        
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      using System;

      using System.Collections.Generic;

      using System.Linq;

      using System.Text;

      using System.Windows.Forms;

      namespace Implab.Fx

      {

          public static class ControlHelpers

          {

              /// <summary>

              /// Переключает обработку обещания в поток указанного элемента управления.

              /// </summary>

              /// <typeparam name="T">Тип результата обещания</typeparam>

              /// <param name="that">Исходное обещание</param>

              /// <param name="ctl">Элемент управления</param>

              /// <returns>Новое обещание, обработчики которого будут выполнены в потоке элемента управления.</returns>

              /// <exception cref="ArgumentNullException">Параметр не может быть <c>null</c>.</exception>

              /// <example>

              /// client

              ///     .Get("description.txt") // returns a promise

              ///     .DirectToControl(m_ctl) // handle the promise in the thread of the control

              ///     .Then(

              ///         description => m_ctl.Text = description // now it's safe

              ///     )

              /// </example>

              public static Promise<T> DirectToControl<T>(this Promise<T> that, Control ctl)

              {

                  if (that == null)

                      throw new ArgumentNullException("that");

                  if (ctl == null)

                      throw new ArgumentNullException("ctl");

                  var directed = new Promise<T>();

                  that.Then(

                      res =>

                      {

                          if (ctl.InvokeRequired)

                              ctl.Invoke(new Action<T>(directed.Resolve),res);

                          else

                              directed.Resolve(res);

                      },

                      err =>

                      {

                          if (ctl.InvokeRequired)

                              ctl.Invoke(new Action<Exception>(directed.Reject), err);

                          else

                              directed.Reject(err);

                      }

                  );

                  return directed;

              }

          }

      }

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				using System;
				using System.Collections.Generic;
				using System.Linq;
				using System.Text;
				using System.Windows.Forms;

				namespace Implab.Fx
				{
				public static class ControlHelpers
				{
				/// <summary>
				/// Переключает обработку обещания в поток указанного элемента управления.
				/// </summary>
				/// <typeparam name="T">Тип результата обещания</typeparam>
				/// <param name="that">Исходное обещание</param>
				/// <param name="ctl">Элемент управления</param>
				/// <returns>Новое обещание, обработчики которого будут выполнены в потоке элемента управления.</returns>
				/// <exception cref="ArgumentNullException">Параметр не может быть <c>null</c>.</exception>
				/// <example>
				/// client
				/// .Get("description.txt") // returns a promise
				/// .DirectToControl(m_ctl) // handle the promise in the thread of the control
				/// .Then(
				/// description => m_ctl.Text = description // now it's safe
				/// )
				/// </example>
				public static Promise<T> DirectToControl<T>(this Promise<T> that, Control ctl)
				{
				if (that == null)
				throw new ArgumentNullException("that");
				if (ctl == null)
				throw new ArgumentNullException("ctl");

				var directed = new Promise<T>();

				that.Then(
				res =>
				{
				if (ctl.InvokeRequired)
				ctl.Invoke(new Action<T>(directed.Resolve),res);
				else
				directed.Resolve(res);
				},
				err =>
				{
				if (ctl.InvokeRequired)
				ctl.Invoke(new Action<Exception>(directed.Reject), err);
				else
				directed.Reject(err);
				}
				);

				return directed;
				}
				}
				}