--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MetroWpf/MetroWpf.Xaml/Converters/CollapseWhenZeroConverter.cs	Mon Mar 12 23:05:21 2012 +0800
@@ -0,0 +1,33 @@
+namespace MetroWpf.Xaml.Converters
+{
+    using System;
+    using System.Globalization;
+    using System.Windows;
+    using System.Windows.Data;
+
+    public class CollapseWhenZeroConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            bool collapse = false;
+
+            var i = (int)value;
+            if (i == 0)
+            {
+                collapse = true; 
+            }
+
+            if ((string)parameter == "Inverse")
+            {
+                collapse = !collapse;
+            }
+
+            return collapse ? Visibility.Collapsed : Visibility.Visible;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            throw new NotSupportedException();
+        }
+    }
+}