C# - Hello World

Console.WriteLine("Hello World!");
string aFriend = "Minecraft Steve";
string bFriend = "Lego Man";
Console.WriteLine(aFriend);
Console.WriteLine($"{aFriend} has fallen into the river of Lego City");
Console.WriteLine($"However {bFriend} refuses to help {aFriend}");
Console.WriteLine($"But did you know that {bFriend} has {bFriend.Length} letters!");
Console.WriteLine($"Whilst {aFriend} has {aFriend.Length} letters.");
//
string greeting = "      What's up?       ";
Console.WriteLine($"[{greeting}]");
string trimmedGreeting = greeting.TrimStart();
Console.WriteLine($"[{trimmedGreeting}]");
trimmedGreeting = greeting.TrimEnd();
Console.WriteLine($"[{trimmedGreeting}]");
trimmedGreeting = greeting.Trim();
Console.WriteLine($"[{trimmedGreeting}]");
string sayYeet = "Yeet";
Console.WriteLine(sayYeet);
sayYeet = sayYeet.Replace("Yeet", "Lit Fam Gucci");
Console.WriteLine(sayYeet);
Console.WriteLine(sayYeet.ToUpper());
Console.WriteLine(sayYeet.ToLower());
//
string songLyrics = "A man has fallen into the river of Lego City";
Console.WriteLine(songLyrics.Contains("river"));
Console.WriteLine(songLyrics.Contains("Township"));
Console.WriteLine(songLyrics.StartsWith("A"));
Console.WriteLine(songLyrics.EndsWith("Rural-Community"));