title: Xamarin Forms resize grid animation in MVVM
body: <p>I can't figure it out <strong>how make a simple animation where after the click of a button a grid element changes it's size</strong>.
  I work with <strong>MVVM</strong> so, like WPF if it's possible I prefere a "<strong>full xaml</strong>" solution (in my head a simple animation is charged to the view and not to the viewModel).</p>
  
  <p>How can i do it? </p>
  
  <p>Thank you</p>