public void Picker(object sender, System.EventArgs e)
{
//this is honestly the weirdest stuff, the about view model somehow gets instantiated and called before
//the actual page appears, so on app start up, and this gets run, even though the binding context hasn't been
//set yet, so it crashes here on startup because _viewModel is null. Needed to add this just to stop it
//from crashing at startup
if (_viewModel != null)
{
_viewModel.UpdateDonutChart();
}
}