MonoGame.XNASamples/Samples/PushRecipe_WP7_SL/Source/WindowsPhone.Recipes.Push.Client/Controls/ProgressBar/BooleanToVisibilityConverter.cs

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;
using System.Windows.Data;
using System.Globalization;

namespace WindowsPhone.Recipes.Push.Client.Controls
{
    public sealed class BooleanToVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var flag = false;
            if (value is bool)
            {
                flag = (bool)value;
            }
            else if (value is bool?)
            {
                var nullable = (bool?)value;
                flag = nullable.GetValueOrDefault();
            }
            if (parameter != null)
            {
                if (bool.Parse((string)parameter))
                {
                    flag = !flag;
                }
            }
            if (flag)
            {
                return Visibility.Visible;
            }
            else
            {
                return Visibility.Collapsed;
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var back = ((value is Visibility) && (((Visibility)value) == Visibility.Visible));
            if (parameter != null)
            {
                if ((bool)parameter)
                {
                    back = !back;
                }
            }
            return back;
        }
    } 

}