public void AddRemovePlayers()
{
Roster roster = new Roster();
Player player1 = new Player("Tim", "Hines", "07786062333");
Player player2 = new Player("Will", "Hearn", "07971323947");
roster.AddPlayer(player1);
roster.AddPlayer(player2);
Assert.Equal(2, roster.AllPlayers().Count);
roster.RemovePlayer(0);
Assert.Equal(1, roster.AllPlayers().Count);
Assert.Equal("Will", roster.GetPlayer(0).First_name);
}