I'm using the latest Telerik assemblies (2019.2.508.40) and when I utilize the new RadOpenFileDialog it doesn't seem to capture the theme on the form (when executing ShowDialog()). It opens with the normal RadForm look (blue). My theme set on the form is Fluent. I checked the properties on the RadOpenFileDialog, but am not seeing a ThemeName property.
RadOpenFileDialog openFileDialog = new RadOpenFileDialog();
DialogResult result = openFileDialog.ShowDialog();