Inventory Manager

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

namespace Inventory_Manager
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();

            Dictionary<string, List<Item>> items = new Dictionary<string, List<Item>>();

            var set = new HashSet<Item>();

            StringBuilder str = new StringBuilder();

            while (input != "end")
            {
                string[] parameters = input.Split(' ');
                if (parameters[0] == "add")
                {
                    var item = new Item(parameters[1], double.Parse(parameters[2]), parameters[3]);
                    if (!set.Add(item))
                    {
                        str.AppendLine($"Error: Item {parameters[1]} already exists");

                        input = Console.ReadLine();
                        continue;
                    }
                    else
                    {
                        // add jeans 10.99 clothes
                        // add pants 10.99 clothes
                        if (items.ContainsKey(parameters[3]))
                        {
                            items[parameters[3]].Add(item);
                        }
                        else
                        {
                            items.Add(parameters[3], new List<Item> { item });
                        }

                        str.AppendLine($"Ok: Item {parameters[1]} added successfully");

                        input = Console.ReadLine();
                        continue;
                    }
                }

                if (parameters[0] == "filter")
                {
                    var criteria = parameters[2];

                    if (criteria == "type")
                    {
                        //filter by type clothes
                        if (!items.ContainsKey(parameters[3]))
                        {
                            str.AppendLine($"Error: Type {parameters[3]} does not exists");

                            input = Console.ReadLine();
                            continue;
                        }

                        var msg = $"Ok: {string.Join(", ", items[parameters[3]].OrderBy(p => p.Price).ThenBy(p => p.Name)/*.ThenBy(p => p.Type)*/.Take(10))}";
                        str.AppendLine(msg);

                        input = Console.ReadLine();
                        continue;
                    }
                    else if (criteria == "price")
                    {
                        if (parameters[3] == "from")
                        {
                            if (parameters.Length > 5)
                            {
                                    str.AppendLine($"Ok: {string.Join(", ", set.Where(p => p.Price > double.Parse(parameters[4])  && p.Price < double.Parse(parameters[6])).OrderBy(p => p.Price).ThenBy(p => p.Name).ThenBy(p => p.Type).Take(10)/*.Select(p => p.ToString())*/)}");

                                    input = Console.ReadLine();
                                    continue;

                            }

                            str.AppendLine($"Ok: {string.Join(", ", set.Where(p => p.Price > double.Parse(parameters[4])).OrderBy(p => p.Price).ThenBy(p => p.Name).ThenBy(p => p.Type).Take(10)/*.Select(p => p.ToString())*/)}");

                            input = Console.ReadLine();
                            continue;
                        }
                        else if (parameters[3] == "to")
                        {
                            str.AppendLine($"Ok: {string.Join(", ", set.Where(p => p.Price < double.Parse(parameters[4])).OrderBy(p => p.Price).ThenBy(p => p.Name).ThenBy(p => p.Type).Take(10)/*.Select(p => p.ToString())*/)}");

                            input = Console.ReadLine();
                            continue;
                        }
                    }
                }
            }

            Console.WriteLine(str);
        }
    }

    public class Item
    {
        double price;
        string name;
        string type;
        public Item(string name, double price, string type)
        {
            this.Name = name;
            this.Price = price;
            this.Type = type;
        }

        public double Price { get => this.price; set => this.price = value; }
        public string Name { get => this.name; set => this.name = value; }
        public string Type { get => this.type; set => this.type = value; }
        public override string ToString()
        {
            return $"{this.Name}({this.price})";
        }
        public override bool Equals(object obj)
        {
            if (obj == null || !this.GetType().Equals(obj.GetType()))
            {
                return false;
            }

            var comp = obj as Item;

            return this.Name.Equals(comp.Name);
        }
        public override int GetHashCode()
        {
            return Name.GetHashCode();
        }
    }
}