Program.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace VehicleInventory
{
	class Program
	{
		static void Main(string[] args)
		{
			string filepath = @"/Volumes/krb11010/3220/CarInventory-Complete/VehicleInventory.csv";
			List<Car> cars = FileHelper.GetCars(filepath);

			while (true)
			{
				Console.Clear();
				Console.WriteLine("Input the number for what you're trying to search by:");
				Console.WriteLine("1 - Search by manufacturer");
				Console.WriteLine("2 - Search by year");
				Console.WriteLine("3 - Search by mileage range");
				Console.WriteLine("4 - Search by price range");
				Console.WriteLine("10 - Exit");
				string action = Console.ReadLine();

				List<Car> searchResult = new List<Car>();
				switch (action)
				{
					case "1":
						Console.WriteLine("What vehicle manufacturer is the customer interested in?");
						string make = Console.ReadLine();

						searchResult = cars.Where(w => w.Make == make).ToList();
						break;
					case "2":
						Console.WriteLine("What year vehicle is the customer interested in?");
						double year = Convert.ToDouble(Console.ReadLine());

						searchResult = cars.Where(w => w.Year == year).ToList();
						break;
					case "3":
						Console.WriteLine("What is the minimum number of acceptable miles?");
						double mileMinimum = Convert.ToDouble(Console.ReadLine());

						Console.WriteLine("What is the maximum number of acceptable miles?");
						double mileMaximum = Convert.ToDouble(Console.ReadLine());

						searchResult = cars.Where(w => w.Mileage >= mileMinimum && w.Mileage <= mileMaximum).ToList();
						break;
					case "4":
						Console.WriteLine("What is the minimum price the customer wants to pay?");
						decimal priceMinimum = Convert.ToDecimal(Console.ReadLine());

						Console.WriteLine("What is the maximum price the customer wants to pay?");
						decimal priceMaximum = Convert.ToDecimal(Console.ReadLine());

						searchResult = cars.Where(w => w.Price >= priceMinimum && w.Price <= priceMaximum).ToList();
						break;
					case "10":
						Environment.Exit(0);
						break;
					default:
						Console.WriteLine("Please input a valid response. Hit return to try again...");
						Console.ReadLine();
						continue; // Start over, don't display results
				}

				if (searchResult.Count > 0)
				{
					Console.Clear();
					Console.WriteLine("Search Results");
					Console.WriteLine();

					foreach (Car car in searchResult)
					{
						Console.WriteLine(car.GetDetails());
					}

					Console.WriteLine();
					Console.WriteLine("Press return to search again");
					Console.ReadLine();
				}

				// else No results, try again

			}
		}
	}
}