/// <summary>
 /// Remove the selected car from comparison list.
 /// </summary>
 /// <param name="sender"></param>
 private void RemoveCurrentFromCompare(object sender)
 {
     if (CarToRemove != null)
     {
         CompareCollection.Remove(CarToRemove);
     }
 }
        /// <summary>
        /// Adding the selected car to comparison list.
        /// </summary>
        private void AddCarToCompare(object sender = null)
        {
            foreach (var carItem in CarCollection)
            {
                if (carItem.FullName != CarToAdd.FullName ||
                    CompareCollection.Contains(carItem))
                {
                    continue;
                }

                CompareCollection.Add(carItem);
            }
        }