mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/NullToBooleanConverter.cs

   1 //------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //------------------------------------------------------------
   4
   5 namespace System.Activities.Presentation
   6 {
   7     using System.Globalization;
   8     using System.Windows.Data;
   9
  10     //Null To Boolean Converter
  11     internal sealed class NullToBooleanConverter : IValueConverter
  12     {
  13         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
  14         {
  15             return value != null;
  16         }
  17
  18         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
  19         {
  20             throw FxTrace.Exception.AsError(new NotSupportedException());
  21         }
  22     }
  23
  24 }