title: How to solve problem with functions in API 29?
body: <p>I use some functions <em>(API 29)</em> and have the same problem.</p>
  <p>For example, I have a custom button and want to use <code>BlendModeColorFilter</code> to change the color of the icon</p>
  <pre><code>protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
  {
      _defaultColor = CustomRoundButton.GetTintColor(Element).ToAndroid();
      var defaultColorFilter = new BlendModeColorFilter(_defaultColor, BlendMode.SrcIn);
      var whiteColorFilter = new BlendModeColorFilter(Color.White, BlendMode.SrcIn);
      
      Control.GetCompoundDrawables()[0].SetColorFilter(Control.GetCompoundDrawables()[0].ColorFilter == defaultColorFilter
      ? whiteColorFilter
      : defaultColorFilter);
  }
  </code></pre>
  <p>But I have a  mistake
  <a href="https://i.stack.imgur.com/pEnMf.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pEnMf.png" alt="enter image description here" /></a></p>
  <p>I updated my Target Framework but I do not know to do
  <a href="https://i.stack.imgur.com/lfOAO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lfOAO.png" alt="enter image description here" /></a></p>