Added Final code.

Added concise and final code.

ArrayCode.cs

@@ -12,7 +12,7 @@ public class ArrayCode
     static bool AnsweredPrompt = false;
     static ConsoleKeyInfo CurrentKey;
 
-    public static void Main(string[] args)
+    public static void Run(string[] args)
     {
         StartTimer();
         Console.Clear();

ArrayResize.cs

@@ -13,7 +13,7 @@ public class ArrayResize
     static ConsoleKeyInfo CurrentKey;
 
 
-    public static void Main(string[] args)
+    public static void Run(string[] args)
     {
         Console.Clear();
 
@@ -34,7 +34,7 @@ public static void Main(string[] args)
             if(CharacterCount < TypedCharacters.Length)
             {
                 TypedCharacters[CharacterCount] = CurrentKey.KeyChar;
-                ResizeArray();
+                // ResizeArray();
                 CharacterCount++;
             }
 

Concise.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Timers;
+
+public class Concise {
+
+    static int SecondsToAnswer = 15;
+    static List<char> TypedCharacters = new();
+    static bool HasAnsweredPrompt = false;
+    static ConsoleKeyInfo CurrentKey;
+
+    public static void Run(string[] args) {
+        StartTimer();
+
+        Console.Clear();
+        Console.WriteLine("What is the largest country by land mass?");
+
+        while(!HasAnsweredPrompt) {
+            CurrentKey = Console.ReadKey(true);
+
+            if (CurrentKey.Key == ConsoleKey.Enter) GetAnswer();
+            else if (CurrentKey.Key == ConsoleKey.Escape) return;
+            else if (CurrentKey.Key == ConsoleKey.Backspace)
+            {
+                if (!TypedCharacters.Any()) continue;
+                TypedCharacters.RemoveAt(TypedCharacters.Count - 1);
+            }
+
+            else TypedCharacters.Add(CurrentKey.KeyChar);
+
+            Console.SetCursorPosition(0, 2);
+            Console.Write("\r" + new string(' ', Console.WindowWidth - 1) + "\r");
+            Console.SetCursorPosition(0, 2);
+            TypedCharacters.ForEach(x => Console.Write(x));
+        }
+    }
+
+    public static void StartTimer()
+    {
+        System.Timers.Timer timer = new System.Timers.Timer(1000);
+        timer.Elapsed += UpdateTimer;
+        timer.Enabled = true;
+    }
+
+    public static void UpdateTimer(object source, ElapsedEventArgs e) {
+        if (HasAnsweredPrompt) return;
+        if (SecondsToAnswer-- <= 0) return;
+
+        Console.SetCursorPosition(0, 1);
+        Console.WriteLine($"{SecondsToAnswer} seconds left!");
+        Console.SetCursorPosition(TypedCharacters.Count, 2);
+    }
+
+    public static void GetAnswer()
+    {
+        Console.Write("Your answer was: ");
+        TypedCharacters.ForEach(x => Console.Write(x)); 
+        Environment.Exit(0);
+    }
+} 

FinalCode.cs

@@ -0,0 +1,87 @@
+
+using System;
+using System.Timers;
+
+public class Solution {
+
+    // Create the timer
+    static System.Timers.Timer timer;
+
+    // Timer Length
+    static int SecondsToAnswer = 15;
+
+    // Array to store chars
+    static char[] TypedCharacters = new char[0];
+
+    static bool HasAnsweredPrompt = false;
+    static ConsoleKeyInfo CurrentKey;
+
+    public static void Main(string[] args) {
+
+        StartTimer();
+
+        Console.Clear();
+        Console.WriteLine("What is the largest country by land mass?");
+
+        while(!HasAnsweredPrompt) {
+            CurrentKey = Console.ReadKey(true);
+
+            if (CurrentKey.Key == ConsoleKey.Enter) GetAnswer();
+
+            else if (CurrentKey.Key == ConsoleKey.Escape) return;
+
+            else if (CurrentKey.Key == ConsoleKey.Backspace)
+            {
+                if (!TypedCharacters.Any()) continue;
+                char[] temp = new char[TypedCharacters.Length - 1];
+                for(int i = 0; i < TypedCharacters.Length - 1; i++)
+                    temp[i] = TypedCharacters[i];
+                TypedCharacters = temp;
+            }
+
+            else
+            {
+                char[] temp = new char[TypedCharacters.Length + 1];
+                for(int i = 0; i < TypedCharacters.Length; i++)
+                    temp[i] = TypedCharacters[i];
+                temp[^1] = CurrentKey.KeyChar;
+                TypedCharacters = temp;
+            }
+
+            Console.SetCursorPosition(0, 2);
+            Console.Write("\r" + new string(' ', Console.WindowWidth - 1) + "\r");
+            Console.SetCursorPosition(0, 2);
+
+            for(int i = 0; i < TypedCharacters.Length; i++)
+                Console.Write(TypedCharacters[i]);
+        }
+    }
+
+    public static void StartTimer()
+    {
+        timer = new System.Timers.Timer(1000);
+        timer.Elapsed += UpdateTimer;
+        timer.Enabled = true;
+    }
+
+    public static void UpdateTimer(object source, ElapsedEventArgs e) {
+        if (HasAnsweredPrompt) timer.Enabled = false;
+        if (SecondsToAnswer-- <= 0) return;
+
+        Console.SetCursorPosition(0, 1);
+        Console.WriteLine($"{SecondsToAnswer} seconds left!");
+        Console.SetCursorPosition(TypedCharacters.Length, 2);
+    }
+
+    public static void GetAnswer()
+    {
+        HasAnsweredPrompt = true;
+        Console.Clear();
+        Console.Write("Your answer was: ");
+        for (int i = 0; i < TypedCharacters.Length; i++)
+            Console.Write(TypedCharacters[i]);
+        Console.WriteLine();
+        Console.WriteLine("You had " + SecondsToAnswer + " seconds left!");
+        Environment.Exit(0);
+    }
+} 

Timer_GCSE_Coursework.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>