public class CustomEditorRenderer : EditorRenderer
	{
		private const int InitialNumberLine = 4;
		private double _height;
		private double _lineHeight;
		private int _lastNumerOfLines;
	    protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
	    {
		    base.OnElementChanged(e);
		    if (Control == null) return;
			Control.ScrollChange += Control_ScrollChange;
			Control.SetBackgroundColor(Android.Graphics.Color.Transparent);
			Control.SetLines(InitialNumberLine);
		    _lastNumerOfLines = InitialNumberLine;
	    }

		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
	    {
			base.OnElementPropertyChanged(sender, e);

		    if (Control.LineCount < _lastNumerOfLines && _lastNumerOfLines > InitialNumberLine)
		    {
				((CustomEditor)sender).HeightRequest = ((CustomEditor)sender).Height - _lineHeight / 2;
			}

			if (_height != 0)
		    {
			    Control.SetLines(Control.LineCount + 1);
			    ((CustomEditor) sender).HeightRequest = ((CustomEditor) sender).Height + _height / 4;
			    _height = 0;
		    }
		    _lastNumerOfLines = Control.LineCount;
	    }

		private void Control_ScrollChange(object sender, ScrollChangeEventArgs e)
		{
			if (Control.ScrollY == 0) return;
			_height = Control.ScrollY;
			Control.ScrollY = 0;
			if (_lineHeight == 0) _lineHeight = _height;

			//if(Control.Text[Control.Text.Length-1] != ' ') Control.Append(" ");
		}
	}