Forum topics - Nested dict

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

namespace forum_topics
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, HashSet<string>> topics = new Dictionary<string, HashSet<string>>();
            string inputline = Console.ReadLine();

            while (inputline != "filter")
            {
                var inputData = inputline.Split(new[] { '-', '>', ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
                var currentKey = inputData[0];

                if (!topics.ContainsKey(currentKey))
                {
                    topics[currentKey] = new HashSet<string>();
                }
                for (int i = 1; i < inputData.Length; i++)
                {
                    topics[currentKey].Add(inputData[i]);
                }
                inputline = Console.ReadLine();
            }
            var tagSequence = Console.ReadLine().Split(new[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries).ToList();

            foreach (var entry in topics)
            {
                bool containsTag = false;
                for (int i = 0; i < tagSequence.Count; i++)
                {
                    if (entry.Value.Contains(tagSequence[i]))
                    {
                        containsTag = true;
                    }
                    else
                    {
                        containsTag = false;
                        break;
                    }
                }

                var topic = entry.Key;
                var tags = entry.Value;

                if (containsTag)
                {
                    Console.WriteLine($"{topic} | #{string.Join(", #", tags)}");
                }
            }
        }
    }
}