using System;

using System.Collections.Generic;

using System.Linq;

​

public class GameConnection

{

    public string From { get; set; }

    public string To { get; set; }

}

public class Program

{

    private static IEnumerable<GameConnection> Solve(IEnumerable<GameConnection> tree, string from) {

        var agenda = new Queue<GameConnection>(tree.Where(item => item.From == from));  

​

        while (agenda.Count > 0) {

            var current = agenda.Dequeue();

​

            yield return current;

​

            foreach (var child in tree.Where(item => item.From == current.To))

                agenda.Enqueue(child);  

        }

    }

    public static void Main()

    {

        List<GameConnection> list = new() {

            new GameConnection() { From = "Game", To = "Player 5" },

            new GameConnection() { From = "Game", To = "Player 10" },

            new GameConnection() { From = "Game", To = "Player 51" },

            new GameConnection() { From = "Player 51", To = "Player 14" },

            new GameConnection() { From = "Player 10", To = "Player 8" },

            new GameConnection() { From = "Player 8", To = "Player 4" },

            new GameConnection() { From = "Player 8", To = "Player 7" },

            new GameConnection() { From = "Player 8", To = "Player 1" },

            new GameConnection() { From = "Player 4", To = "Player 38" },

            new GameConnection() { From = "Player 38", To = "Player 35" },

            new GameConnection() { From = "Player 38", To = "Player 96" },

        };

        Console.WriteLine(string.Join(Environment.NewLine, Solve(list, "Player 10")

            .Select(item => $"{item.From}    -> {item.To}")));  

    }

}