//Show details window on button click
private void BtnShowDetails_Click(object sender, RoutedEventArgs e)
{
if (dw == null)
{
dw = new DetailWindow(vm)
{
Owner = this,
WindowStartupLocation = WindowStartupLocation.CenterOwner
};
dw.Closed += Dw_Closed;
dw.Show();
}
}
//On close, reset dw to null to remove window private void Dw_Closed(object sender, System.EventArgs e) => dw = null;