CQRS.cs

// This is not CQRS:
public interface IRobotService
{
  void Walk();
  void Sleep();
  int GetBatteryLevel();
  void GoOutAndComeBackInAgain();
}

// This is CQRS. You can "level-up" from here, but this is all it is, really
public IRobotCommands
{
  void Walk();
  void Sleep();
  void GoOutAndComeBackInAgain();
}

public IRobotQueries
{
  int GetBatteryLevel();
}