We are trying to use an objectanimator proxy to animate the TopMargin property in Android (Xamarin).

However, we get this error: 

> 
> [PropertyValuesHolder] Couldn't find setter/getter for property
>  TopMargin with value type float
> 
> 
> 

Note: we tried TopMargin, topMargin, GetTopMargin, getTopMargin, etc., thinking that it might be an issue of casing conversion betwen Java and C#, but it doesn't look to be the case.

Our code in the Activity starting the animation:

```
translation = new int[] {0, 300};
var anim2 = ObjectAnimator.OfInt( new MarginProxyAnimator(myview), "TopMargin",translation);
anim2.SetDuration(500);
anim2.Start(); 

```

Our proxy class:

```
public class MarginProxyAnimator : Java.Lang.Object 
{
///... other code...
    public int getTopMargin() {
    var lp = (ViewGroup.MarginLayoutParams)mView.LayoutParameters;
    return lp.TopMargin;
    }

    public void setTopMargin(int margin) {
    var lp = (ViewGroup.MarginLayoutParams)mView.LayoutParameters;
        lp.SetMargins(lp.LeftMargin, margin, lp.RightMargin, lp.BottomMargin);
    mView.RequestLayout();
    }
}

```

Any advise? a pointer to a working Xamarin sample using a proxy would be helpful.

thanks.