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Update Focused Field for FrameworkElement

//http://simpledbbrowser.codeplex.com/ //License:  Microsoft Public License (Ms-PL)   using System.Diagnostics; using System.IO; using System.Runtime.Serialization.Formatters.Binary; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; namespace AWS.Framework.WPF.Utility {     public sealed class Helpers     {         #region Constructor         private Helpers()         { }         #endregion // Constructor         #region Methods         public static void UpdateFocusedField()         {             FrameworkElement fwe = Keyboard.FocusedElement as FrameworkElement;             if (fwe != null)             {                 BindingExpression expression = null;                 if (fwe is TextBox)                     expression = fwe.GetBindingExpression(TextBox.TextProperty);                 // TODO - developers - add more control types here. Won't be that many.                 // this would include custom TextBox controls or 3rd party TextBox controls                 if (expression != null)                     expression.UpdateSource();             }         }         #endregion // Methods     } }