List Manipulation Advanced

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

namespace _7_ListManipulationAdvanced
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> nums = Console.ReadLine().Split().Select(int.Parse).ToList();
            string command = Console.ReadLine();
            bool isChanged = false;
            while (command != "end")
            {
                List<string> commandArr = command.Split().ToList();

                if (commandArr[0] == "Add")
                {
                    nums.Add(int.Parse(commandArr[1]));
                    isChanged = true;
                }
                else if (commandArr[0] == "Remove")
                {
                    nums.Remove(int.Parse(commandArr[1]));
                    isChanged = true;
                }
                else if (commandArr[0] == "RemoveAt")
                {
                    nums.RemoveAt(int.Parse(commandArr[1]));
                    isChanged = true;
                }
                else if (commandArr[0] == "Insert")
                {

                    nums.Insert(int.Parse(commandArr[2]), int.Parse(commandArr[1]));
                    isChanged = true;

                }
                else if (commandArr[0] == "Contains")
                {
                    Contain(nums, commandArr);
                }
                else if(commandArr[0] == "PrintEven")
                {
                    PrintEven(nums);
                }
                else if (commandArr[0] == "PrintOdd")
                {
                    PrintOdd(nums);

                }
                else if (commandArr[0] == "GetSum")
                {
                    Console.WriteLine(GetSum(nums));
                }
                else if (commandArr[0] == "Filter")
                {
                    Filter(nums, commandArr);
                }

                command = Console.ReadLine();
            }
            if (isChanged)
            {
                Console.WriteLine(string.Join(" ", nums));

            }
        }
        static void Contain(List<int> nums, List<string> commandArr)
        {
            bool isIn = nums.Contains(int.Parse(commandArr[1]));
            if (isIn)
            {
                Console.WriteLine("Yes");
            }
            else
            {
                Console.WriteLine("No such number");
            }
        }
        static void PrintEven(List<int> nums)
        {
            for (int i = 0; i < nums.Count; i++)
            {
                if(nums[i]%2==0)
                {
                    Console.Write(nums[i]+" ");
                }
            }
        }
        static void PrintOdd(List<int> nums)
        {
            for (int i = 0; i < nums.Count; i++)
            {
                if (nums[i] % 2 != 0)
                {
                    Console.Write(nums[i] + " ");

                }
            }
        }
        static int GetSum(List<int> nums)
        {
            int sum = 0;
            for (int i = 0; i < nums.Count; i++)
            {
                sum += nums[i];
            }
            return sum;
        }
        static void Filter(List<int> nums, List<string> commandArr)
        {
            if(commandArr[1]=="<")
            {
                for (int i = 0; i < nums.Count; i++)
                {
                    if(nums[i] < int.Parse(commandArr[2]))
                    {
                        Console.Write(nums[i] + " ");
                    }
                }
            }
            else if (commandArr[1] == ">")
            {
                for (int i = 0; i < nums.Count; i++)
                {
                    if (nums[i] > int.Parse(commandArr[2]))
                    {
                        Console.Write(nums[i] + " ");
                    }
                }
            }
            else if (commandArr[1] == "<=")
            {
                for (int i = 0; i < nums.Count; i++)
                {
                    if (nums[i] <= int.Parse(commandArr[2]))
                    {
                        Console.Write(nums[i] + " ");
                    }
                }
            }
            else if (commandArr[1] == ">=")
            {
                for (int i = 0; i < nums.Count; i++)
                {
                    if (nums[i] >= int.Parse(commandArr[2]))
                    {
                        Console.Write(nums[i] + " ");
                    }
                }
            }
        }
    }
}