WPF VB.Net

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="Microsoft.Samples.Graphics.RectangleExample"
    WindowTitle="Rectangle Example">
  
      Width="100"
    Height="50"
    Fill="Blue"
    Stroke="Black" StrokeThickness="4"
    RadiusX="20" RadiusY="20"
    Canvas.Left="10"
    Canvas.Top="100"/>