WPF

   <Grid>
        <StackPanel>
            <TextBlock>My UI</TextBlock>
            <ListBox>
                <ListBoxItem>Item 1</ListBoxItem>
                <ListBoxItem>Item 2</ListBoxItem>
            </ListBox>
            <RichTextBox>  </RichTextBox>
        </StackPanel>
    </Grid>  

   <Grid>
        <Border BorderBrush="Black" BorderThickness="5" Margin="10" Padding="5">
            <Button>Click Me!</Button>
        </Border>
    </Grid> 

  <Grid>
        <Ellipse Width="200" Height="150">
            <Ellipse.Fill>
                <LinearGradientBrush>
                    <GradientStop Offset="0" Color="Teal"/>
                    <GradientStop Offset="1" Color="Aqua"/>
                </LinearGradientBrush>
            </Ellipse.Fill>
        </Ellipse>
    </Grid>  

 <Grid>
        <Button>
            <Ellipse Width="200" Height="150">
                <Ellipse.Fill>
                    <LinearGradientBrush>
                        <GradientStop Offset="0" Color="Teal"/>
                        <GradientStop Offset="1" Color="Aqua" />
                    </LinearGradientBrush>
                </Ellipse.Fill>
            </Ellipse>
        </Button>
    </Grid>