/// <summary>
/// Posts an Ad.
/// </summary>
/// <remarks>
/// To successfully post an Ad, ad argument must contain a valid User that posted the ad, and userPassword argument must match that User's password in DB.
/// </remarks>
/// <param name="ad">Ad to post.</param>
/// <returns>The Book ad that was posted.</returns>
///
public BookAd PostAd(BookAd ad)
{
ad.Id = ++bookAdCount;
bookAds.Add(ad);
return(ad);
}
/// <summary>
/// Posts an Ad.
/// </summary>
/// <remarks>
/// To successfully post an Ad, ad argument must contain a valid User that posted the ad, and userPassword argument must match that User's password in DB.
/// </remarks>
/// <param name="ad">Ad to post.</param>
/// <returns>The Book ad that was posted.</returns>
///
public BookAd PostAd(BookAd ad)
{
ad.Id = ++bookAdCount;
bookAds.Add(ad);
return ad;
}