/// <summary>
/// Builds the grammar required to recognize the voice commands that control the <see cref="IAirConditioner"/>.
/// </summary>
/// <returns> The grammar with the supported commands. </returns>
private Grammar BuildAirConditionerControlGrammar()
{
Choices commandCatalog = new Choices();
return(commandCatalog.AddPowerOnCommand()
.AddPowerOffCommand()
.AddCurrentTemperatureCommand()
.AddHeatRoomCommand()
.AddCoolRoomCommand()
.AddChangeTemperatureCommand()
.BuildGrammar());
}