title: CalendarDatePicker has two shades background
body: <p>I am having a problem with my calendardatepicker. My calendardatepicker is located in a custom dialog and when the calendar is open the background has two colors and I don't know how to solve it. I am new to XAML.</p>
  <p><a href="https://i.stack.imgur.com/eQkId.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eQkId.png" alt="enter image description here" /></a></p>