Advanced List Manipulation

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

namespace SoftUniLists
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Enter your numbers here: ");
            List<int> numbers = ReadList();
            Console.WriteLine("There are several command you can use now:");
            Console.WriteLine("Add {} - adds the given number to the list.");
            Console.WriteLine("Remove {} - removes the given number from  the list.");
            Console.WriteLine("RemoveAt {} - removes a number from the given index.");
            Console.WriteLine("Insert {number} {index}  - removes a given number from a given index.");
            Console.WriteLine("Contains {} - checks if the given number is in the list.");
            Console.WriteLine("GetMax {} - returns the biggest number from the list.");
            Console.WriteLine("Filter {condition} {number} - returns the numbers that fulfill the condition.");
            Console.WriteLine("PrintOdd - prints all odd numbers from the list.");
            Console.WriteLine("PrintEven - prints all even numbers from the list.");
            Console.WriteLine("end - stops the program and prints the final list.");
            while (true)
            {
                string line = Console.ReadLine();
                if (line == "end")
                {
                    break;
                }

                string[] tokens = line.Split();
                switch (tokens[0])
                {
                    case "Add":
                        Add(numbers, int.Parse(tokens[1]));
                        break;
                    case "Remove":
                        Remove(numbers, int.Parse(tokens[1]));
                        break;
                    case "RemoveAt":
                        RemoveAt(numbers, int.Parse(tokens[1]));
                        break;
                    case "Insert":
                        Insert(numbers, int.Parse(tokens[1]), int.Parse(tokens[2]));
                        break;
                    case "Contains":
                        Contains(numbers, int.Parse(tokens[1]));
                        break;
                    case "PrintEven":
                        PrintEven(numbers);
                        break;
                    case "PrintOdd":
                        PrintOdd(numbers);
                        break;
                    case "GetSum":
                        GetSum(numbers);
                        break;
                    case "Filter":
                        Filter(numbers,tokens[1],int.Parse(tokens[2]));
                        break;
                    default:
                        Console.WriteLine("Invalid command!");
                        break;
                }
            }

            Console.WriteLine(string.Join(" ", numbers));

        }

        static List<int> ReadList()
        {
            List<int> list = new List<int>();
            var line = Console.ReadLine();
            list = line.Split().Select(int.Parse).ToList();
            return list;
        }

        static void PrintList(List<int> list)
        {
            for (int i = 0; i < list.Count; i++)
            {
                Console.WriteLine(list[i]);
            }
        }

        static void Add(List<int> numbers, int num)
        {
            numbers.Add(num);
        }

        static void Remove(List<int> numbers, int num)
        {
            numbers.Remove(num);
        }

        static void RemoveAt(List<int> numbers, int index)
        {
            numbers.RemoveAt(index);
        }

        static void Insert(List<int> numbers, int num, int index)
        {
            numbers.Insert(index, num);
        }

        static void Contains(List<int> numbers, int number)
        {
            if (numbers.Contains(number) == true)
            {
                Console.WriteLine("Yes");
            }
            else
            {
                Console.WriteLine("No such number!");
            }
        }

        static void PrintEven(List<int> numbers)
        {
            foreach (int number in numbers)
            {
                if (number % 2 == 0)
                {
                    Console.Write(number + " ");
                }
            }
        }

        static void PrintOdd(List<int> numbers)
        {
            foreach (int number in numbers)
            {
                if (number % 2 != 0)
                {
                    Console.Write(number + " ");
                }
            }
        }

        static void GetSum(List<int> numbers)
        {
            Console.WriteLine(numbers.Sum());
        }

        static void Filter(List<int> numbers, string condition, int number)
        {
            if(condition == ">")
            {
                foreach(int num in numbers)
                {
                    if(number < num)
                    {
                        Console.Write(num + " ");
                    }

                }
            }
            else if(condition == ">=")
            {
                foreach (int num in numbers)
                {
                    if (number <= num)
                    {
                        Console.Write(num + " ");
                    }

                }
            }
            else if(condition == "<")
            {
                foreach (int num in numbers)
                {
                    if (number > num)
                    {
                        Console.Write(num + " ");
                    }

                }
            }
            else if(condition == "<=")
            {
                foreach (int num in numbers)
                {
                    if (number >= num)
                    {
                        Console.Write(num + " ");
                    }

                }
            }
        }
    }
}