List\List Manipulation Advanced

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

namespace fundamental14
{
    class MainClass
    {
        public static void Main()
        {
            string input = string.Empty;
            List<int> number = Console.ReadLine().Split().Select(int.Parse).ToList();
            //int count = 0;
            List<int>dif = new List<int>(number);

            while((input = Console.ReadLine()) != "end")
            {
                List<string> command = input.Split().ToList();

                if (command[0] == "Contains")
                {
                    int amount = int.Parse(command[1]);

                    if (number.Contains(amount))
                    {
                        Console.WriteLine("Yes");
                    }
                    else
                    {
                        Console.WriteLine("No such number");
                    }
                }
                else if (command[0] == "PrintEven")
                {
                    for (int i = 0; i < number.Count; i++)
                    {
                        if (number[i] % 2 == 0)
                        {
                            Console.Write($"{number[i]} ");
                        }
                    }
                    Console.WriteLine();
                }
                else if (command[0] == "PrintOdd")
                {
                    for (int i = 0; i < number.Count; i++)
                    {
                        if (number[i] % 2 != 0)
                        {
                            Console.Write($"{number[i]} ");
                        }
                    }
                    Console.WriteLine();
                }
                else if (command[0] == "GetSum")
                {
                    Console.WriteLine(number.Sum());
                }
                else if(command[0] == "Filter")
                {
                    int filter = int.Parse(command[2]);

                    if (command[1] == ">=")
                    {
                        for (int i = 0; i < number.Count; i++)
                        {
                            if (number[i] >= filter)
                            {
                                Console.Write($"{number[i]} ");
                            }
                        }
                        Console.WriteLine();
                    }
                    else if (command[1] == "<")
                    {
                        for (int i = 0; i < number.Count; i++)
                        {
                            if (number[i] < filter)
                            {
                                Console.Write($"{number[i]} ");
                            }
                        }
                        Console.WriteLine();
                    }
                    else if (command[1] == "<=")
                    {
                        for (int i = 0; i < number.Count; i++)
                        {
                            if (number[i] <= filter)
                            {
                                Console.Write($"{number[i]} ");
                            }
                        }
                        Console.WriteLine();
                    }
                    else if (command[1] == ">")
                    {
                        for (int i = 0; i < number.Count; i++)
                        {
                            if (number[i] > filter)
                            {
                                Console.Write($"{number[i]} ");
                            }
                        }
                        Console.WriteLine();
                    }
                }
                else if (command[0] == "Add")
                {
                    int amount = int.Parse(command[1]);

                    number.Add(amount);
                    //count++;
                }
                else if (command[0] == "Remove")
                {
                    int amount = int.Parse(command[1]);

                    number.Remove(amount);
                    //count++;
                }
                else if (command[0] == "RemoveAt")
                {
                    int amount = int.Parse(command[1]);

                    number.RemoveAt(amount);
                    //count++;
                }
                else if (command[0] == "Insert")
                {
                    int amount = int.Parse(command[1]);

                    int index = int.Parse(command[2]);
                    number.Insert(index, amount);
                    //count++;
                }
            }
        var compare = (number.All(dif.Contains) && number.Count == dif.Count);

        if (!compare)
        {
        Console.WriteLine(string.Join(" ", number));
        }
        }
    }
}