/// <summary>
/// Returns the membership user's remaining locked out time.
/// </summary>
/// <param name="membershipUser">The membership user that this extension method affects.</param>
/// <exception cref="ArgumentNullException"><paramref name="membershipUser"/> is <c>null</c>.</exception>
public static TimeSpan RemainingLockedOutTime(this MembershipUser membershipUser)
{
if (membershipUser == null)
{
throw new ArgumentNullException("membershipUser");
}
return(membershipUser.IsLockedOut
? membershipUser.UnlockDate() - DateTime.Now
: TimeSpan.Zero);
}