<Window x:Class="Drawing.RoundedRectangles" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="RoundedRectangles" Height="449" Width="340" > <StackPanel> <TextBlock Margin="5,5,0,0">Corner radius of 100 (X) and 60 (Y).</TextBlock> <Rectangle Fill="Yellow" Stroke="Blue" RadiusX="100" RadiusY="60" Width="100" Height="60" Margin="5" HorizontalAlignment="Left"></Rectangle> </StackPanel> </Window>