Rewrite all concepts documentation

hello RC documentation

docs/guides/concepts/samples/connections.cs

@@ -0,0 +1,23 @@
+using Discord;
+using Discord.WebSocket;
+
+public class Program
+{
+	private DiscordSocketClient _client;
+	static void Main(string[] args) => new Program().MainAsync().GetAwaiter().GetResult();
+	
+	public async Task MainAsync()
+	{
+		_client = new DiscordSocketClient();
+
+		await _client.LoginAsync(TokenType.Bot, "bot token");
+		await _client.StartAsync();
+
+		Console.WriteLine("Press any key to exit...");
+		Console.ReadKey();
+
+		await _client.StopAsync();
+		// Wait a little for the client to finish disconnecting before allowing the program to return
+		await Task.Delay(500);
+	}
+}