/// <summary>
	    /// Updates an existing rentalrate in the database from the given dto object.
	    /// </summary>
	    /// <param name="rentalrate">The dto object.</param>
	    public void UpdateRentalRate(RentalRateDto rentalrate)
	    {
	        this.RentalRateService.Update(rentalrate);
	        this.UnitOfWork.SaveChanges();
	    }
	    /// <summary>
	    /// Adds a new rentalrate from the given dto object into the database.
	    /// </summary>
	    /// <param name="rentalrate">The dto object.</param>
	    /// <returns>The dto key of the newly created rentalrate.</returns>
	    public string CreateRentalRate(RentalRateDto rentalrate)
	    {
	        string key = this.RentalRateService.Add(rentalrate);
	        this.UnitOfWork.SaveChanges();
	        return key;
	    }