/// <summary>
/// Shows the dialog.
/// </summary>
/// <param name="viewModel">The view model.</param>
/// <param name="additionalSettings">Additional settings for the dialog.</param>
/// <returns>The view model dialog's result.</returns>
public virtual bool ShowDialog(object viewModel, IDictionary <string, object> additionalSettings = null)
{
var settings = DialogSettings.Create().Centered().WithIcon(_icon).Merge(additionalSettings);
return(ShowDialogCore(viewModel, settings));
}