Initial

BrightSharp/Generic.cs

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+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+
+namespace BrightSharp
+{
+    internal partial class Generic
+    {
+        private const string StyleDictionaryPattern = @"(?<=.+style\.)(.*?)(?=\.xaml)";
+        public void CalendarPreviewMouseUp(object sender, MouseEventArgs e)
+        {
+            if (Mouse.Captured is CalendarItem) { Mouse.Capture(null); }
+        }
+        public void DatePickerUnloaded(object sender, RoutedEventArgs e)
+        {
+            if (sender == null) return;
+            DependencyObject child = ((Popup)((DatePicker)sender).Template.FindName("PART_Popup", (FrameworkElement)sender))?.Child;
+            while (child != null && !(child is AdornerDecorator))
+                child = VisualTreeHelper.GetParent(child) ?? LogicalTreeHelper.GetParent(child);
+            if (((AdornerDecorator)child)?.Child is Calendar) ((AdornerDecorator)child).Child = null;
+        }
+    }
+}