Technological updates for the `Hangover` program

The proposed improvements are:

- Update of the framework to .net6;
- Update Twilio to the latest version;
- Improve readability with clean code;

CSharp/Hangover.cs

@@ -1,34 +1,36 @@
-namespace Hacker_Scripts
+using Twilio;
+using Twilio.Rest.Api.V2010.Account;
+
+//Exit early if any session with my username is found
+if (args[0] is null)
 {
-    using System;
-    using Twilio;
-    using System.Linq;
-
-    class Hangover
-    {
-        public static string TWILIO_ACCOUNT_SID = Environment.GetEnvironmentVariable("TWILIO_ACCOUNT_SID");
-        public static string AUTH_TOKEN = Environment.GetEnvironmentVariable("TWILIO_AUTH_TOKEN");
-
-        public static string YOUR_NUMBER = "9879789978";
-        public static string BOSS_NUMBER = "3213213233";
-
-        static void Main(string[] args)
-        {
-            var twilio = new TwilioRestClient(TWILIO_ACCOUNT_SID, AUTH_TOKEN);
-
-            string[] randomMessages = {
-                "Locked out",
-                "Pipes broke",
-                "Food poisoning",
-                "Not feeling well"
-            };
-
-            int randomIndex = new Random().Next(randomMessages.Count());
-            String messageToSend = (randomMessages[randomIndex]);
-
-            var message = twilio.SendMessage(YOUR_NUMBER, BOSS_NUMBER, messageToSend);
-            Console.WriteLine(message.Sid);
-        }
-    }
+    return;
 }
 
+var twilioAccountSid = Environment.GetEnvironmentVariable("TWILIO_ACCOUNT_SID");
+var authToken = Environment.GetEnvironmentVariable("TWILIO_AUTH_TOKEN");
+
+//Phone numbers
+const string myNumber = "+xxx";
+const string numberOfBoss = "+xxx";
+
+TwilioClient.Init(twilioAccountSid, authToken);
+
+string[] excuses = {
+    "Locked out",
+    "Pipes broke",
+    "Food poisoning",
+    "Not feeling well"
+};
+
+var rand = new Random().Next(excuses.Length);
+var message = $"Gonna work from home. {excuses[rand]}";
+
+//Send a text message
+var response = MessageResource.Create(
+    body: message,
+    from: new Twilio.Types.PhoneNumber(myNumber),
+    to: new Twilio.Types.PhoneNumber(numberOfBoss)
+);
+
+Console.WriteLine(response.Sid);