title: Animate children inside StackPanel - WPF (C#)
body: <p>I have a StackPanel with UserControls as the children. I would like to apply a Storyboard animation which increases the height of the children from 0 to 100 in a second which creates a smooth slide down animation. This will be called for when a new child is added to the StackPanel - <code>StackPanel1.children.Add(usercontrol1)</code>. The StackPanel children are UserControls so I do <strong>not</strong> want to use DataTemplates. Below is an example layout of what I mean.</p>
  
  <p><img src="https://i.stack.imgur.com/Y5e61.png" alt="example layout"></p>
  
  <p>Could someone please help me create this as I have no idea how to make it. Thank you.</p>