chore: created README.md

.gitignore

@@ -361,4 +361,6 @@ MigrationBackup/
 
 # Fody - auto-generated XML schema
 FodyWeavers.xsd
-IAF42_Kaulmann_CarmanagerV2.zip
+
+# Submissions folder (contains submission ZIPs)
+submissions/

CarManagerV2/Car.cs

@@ -1,68 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace CarManagerV3
-{
-    public class Car
-    {
-        int id;
-        string make;
-        string model;
-        int year;
-        string color;
-        int mileage;
-        decimal price;
-        int order;
-
-        public Car(int id, string make, string model, int year, string color, int mileage, decimal price, int order = 0)
-        {
-            this.id = id;
-            this.make = make;
-            this.model = model;
-            this.year = year;
-            this.color = color;
-            this.mileage = mileage;
-            this.price = price;
-            this.order = order;
-        }
-
-        public int Id { get { return id; } set { id = value; } }
-        public string Make { get { return make; } set { make = value; } }
-        public string Model { get { return model; } set { model = value; } }
-        public int Year { get { return year; } set { year = value; } }
-        public string Color { get { return color; } set { color = value; } }
-        public int Mileage { get { return mileage; } set { mileage = value; } }
-        public decimal Price { get { return price; } set { price = value; } }
-        public int Order { get { return order; } set { order = value; } }
-
-
-        public override string ToString()
-        {
-            return $"{make} {model} ({year})";
-        }
-
-        public string ToCsvString()
-        {
-            return $"{id};{make};{model};{year};{color};{mileage};{price}";
-        }
-
-        public static Car FromCsvString(string csv)
-        {
-            string[] parts = csv.Split(';');
-            return new Car(int.Parse(parts[0]), parts[1], parts[2], int.Parse(parts[3]), parts[4], int.Parse(parts[5]), decimal.Parse(parts[6]));
-        }
-
-        public bool IsChanged(Car other)
-        {
-            return make != other.make || model != other.model || year != other.year || color != other.color || mileage != other.mileage || price != other.price || other.color != color;
-        }
-
-        public Car Clone()
-        {
-            return new Car(id, make, model, year, color, mileage, price);
-        }
-    }
-}

CarManagerV2/StateManager.cs

@@ -1,65 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace CarManagerV3
-{
-    internal class StateManager
-    {
-
-        static List<Car> cars = new List<Car>();
-        static string filePath = "cars.csv";
-
-        public static Car GetCarById(int id)
-        {
-            cars = SafeManager.ReadCars(filePath);
-            return cars.FirstOrDefault(c => c.Id == id);
-        }
-
-        public static List<Car> Cars { get { return cars; } set { cars = value; } }
-
-        public static void AddCar(Car car)
-        {
-            cars = SafeManager.ReadCars(filePath);
-            cars.Add(car);
-            SafeManager.SaveCars(filePath, cars);
-        }
-
-        public static void RemoveCar(Car car)
-        {
-            cars = SafeManager.ReadCars(filePath);
-            Car existingCar = GetCarById(car.Id);
-            if (existingCar == null) return;
-            cars.Remove(existingCar);
-            SafeManager.SaveCars(filePath, cars);
-        }
-
-        public static void UpdateCar(Car car)
-        {
-            Car existingCar = GetCarById(car.Id);
-            if (existingCar != null)
-            {
-                int index = cars.IndexOf(existingCar);
-                cars[index] = car;
-                Console.WriteLine("Updated car: " + existingCar.Id);
-                SafeManager.SaveCars(filePath, cars);
-            }
-        }
-
-        public static Car CreateCar(string make, string model, int year, string color, int mileage, decimal price)
-        {
-            cars = SafeManager.ReadCars(filePath);
-            int newId = cars.Count > 0 ? cars.Max(c => c.Id) + 1 : 1;
-            Car newCar = new Car(newId, make, model, year, color, mileage, price);
-            AddCar(newCar);
-            return newCar;
-        }
-
-        public static void setFilePath(string path)
-        {
-            filePath = path;
-        }
-    }
-}

CarManagerV3.sln

@@ -3,7 +3,7 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.14.36414.22
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CarManagerV3", "CarManagerV2\CarManagerV3.csproj", "{93CA258B-A645-41A8-A24F-59036ABC173F}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CarManagerV3", "CarManagerV3\CarManagerV3.csproj", "{93CA258B-A645-41A8-A24F-59036ABC173F}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

CarManagerV3/Car.cs

@@ -0,0 +1,114 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CarManagerV3
+{
+    /// <summary>
+    /// Class <c>Car</c> represents a car with various attributes such as make, model, year, color, mileage, and price.
+    /// </summary>
+    public class Car
+    {
+        public int Id;
+        public string Make;
+        public string Model;
+        public int Year;
+        public string Color;
+        public int Mileage;
+        public decimal Price;
+        public int Order;
+
+        //TODO: Make Id read-only CUID. Allows for better integrity, especially when merging.
+        //TODO: Add buying price and automatic calculation of profit/loss with selling price suggestion.
+        //TODO: Add Buying Date.
+        //TODO: Add sold boolean and Sold Date.
+        //TODO: Add "hidden" attribute for cars that are not for sale anymore but should be kept in the database for records.
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Car"/> class.
+        /// </summary>
+        /// <param name="id">The unique identifier as an Integer.</param>
+        /// <param name="make">The make / manufacturer of the car.</param>
+        /// <param name="model">The model.</param>
+        /// <param name="year">The year the car was built.</param>
+        /// <param name="color">The color of the car.</param>
+        /// <param name="mileage">The current mileage on the car.</param>
+        /// <param name="price">The selling-price of the car.</param>
+        /// <param name="order">The order.</param>
+        public Car(int id, string make, string model, int year, string color, int mileage, decimal price, int order = 0)
+        {
+            this.Id = id;
+            this.Make = make;
+            this.Model = model;
+            this.Year = year;
+            this.Color = color;
+            this.Mileage = mileage;
+            this.Price = price;
+            this.Order = order;
+        }
+
+
+        /// <summary>
+        /// Converts to string in a custom readable format.
+        /// <example>
+        /// For Example:
+        /// Skoda Fabia (2015)
+        /// </example>
+        /// </summary>
+        /// <returns>
+        /// A <see cref="System.String" /> that represents this instance.
+        /// </returns>
+        public override string ToString()
+        {
+            return $"{this.Make} {this.Model} ({this.Year})";
+        }
+
+        /// <summary>
+        /// Converts to default CSV savable string.
+        /// </summary>
+        /// <returns></returns>
+        public string ToCsvString()
+        {
+            return $"{this.Id};{this.Make};{this.Model};{this.Year};{this.Color};{this.Mileage};{this.Price}";
+        }
+
+        //TODO: Add error handling for malformed CSV strings and detection for missing fields.
+        //TODO: Add support for different CSV formats (e.g., different delimiters, quoted fields, etc.).
+        //TODO: Add support for nil or optional fields.
+        //TODO: Add detectin for invalid data / nonsensical values (e.g., negative mileage or year in the future). / Validate it actually is a car.
+        /// <summary>
+        /// Creates a <see cref="Car"/> instance from a CSV string in the default format.
+        /// </summary>
+        /// <param name="csv">The CSV Line.</param>
+        /// <returns>
+        /// A new <see cref="Car"/> instance.
+        /// </returns>
+        public static Car FromCsvString(string csv)
+        {
+            string[] parts = csv.Split(';');
+            return new Car(int.Parse(parts[0]), parts[1], parts[2], int.Parse(parts[3]), parts[4], int.Parse(parts[5]), decimal.Parse(parts[6]));
+        }
+
+        /// <summary>
+        /// Determines whether this <see cref="Car"/> is any different from the provided <see cref="Car" />.
+        /// </summary>
+        /// <param name="other">The <see cref="Car"/> to check against</param>
+        /// <returns>
+        ///   <c>true</c> if the specified other is changed; otherwise, <c>false</c>.
+        /// </returns>
+        public bool IsChanged(Car other)
+        {
+            return this.Make != other.Make || this.Model != other.Model || this.Year != other.Year || this.Color != other.Color || this.Mileage != other.Mileage || this.Price != other.Price || this.Color != other.Color;
+        }
+
+        /// <summary>
+        /// Clones this instance.
+        /// </summary>
+        /// <returns>An identical but seperate <see cref="Car"/></returns>
+        public Car Clone()
+        {
+            return new Car(this.Id, this.Make, this.Model, this.Year, this.Color, this.Mileage, this.Price);
+        }
+    }
+}

CarManagerV3/CarManagerV3.csproj

@@ -6,12 +6,27 @@
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
     <ProjectGuid>{93CA258B-A645-41A8-A24F-59036ABC173F}</ProjectGuid>
     <OutputType>WinExe</OutputType>
-    <RootNamespace>CarManagerV2</RootNamespace>
+    <RootNamespace>CarManagerV3</RootNamespace>
-    <AssemblyName>CarManagerV2</AssemblyName>
+    <AssemblyName>CarManagerV3</AssemblyName>
     <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <Deterministic>true</Deterministic>
+    <PublishUrl>publish\</PublishUrl>
+    <Install>true</Install>
+    <InstallFrom>Disk</InstallFrom>
+    <UpdateEnabled>false</UpdateEnabled>
+    <UpdateMode>Foreground</UpdateMode>
+    <UpdateInterval>7</UpdateInterval>
+    <UpdateIntervalUnits>Days</UpdateIntervalUnits>
+    <UpdatePeriodically>false</UpdatePeriodically>
+    <UpdateRequired>false</UpdateRequired>
+    <MapFileExtensions>true</MapFileExtensions>
+    <ApplicationRevision>0</ApplicationRevision>
+    <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
+    <IsWebBootstrapper>false</IsWebBootstrapper>
+    <UseApplicationTrust>false</UseApplicationTrust>
+    <BootstrapperEnabled>true</BootstrapperEnabled>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -96,6 +111,7 @@
     <Compile Include="Properties\Resources.Designer.cs">
       <AutoGen>True</AutoGen>
       <DependentUpon>Resources.resx</DependentUpon>
+      <DesignTime>True</DesignTime>
     </Compile>
     <None Include="Properties\Settings.settings">
       <Generator>SettingsSingleFileGenerator</Generator>
@@ -110,5 +126,17 @@
   <ItemGroup>
     <None Include="App.config" />
   </ItemGroup>
+  <ItemGroup>
+    <BootstrapperPackage Include=".NETFramework,Version=v4.7.2">
+      <Visible>False</Visible>
+      <ProductName>Microsoft .NET Framework 4.7.2 %28x86 and x64%29</ProductName>
+      <Install>true</Install>
+    </BootstrapperPackage>
+    <BootstrapperPackage Include="Microsoft.Net.Framework.3.5.SP1">
+      <Visible>False</Visible>
+      <ProductName>.NET Framework 3.5 SP1</ProductName>
+      <Install>false</Install>
+    </BootstrapperPackage>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>

CarManagerV3/ImageManager.cs

@@ -7,9 +7,14 @@ using System.Threading.Tasks;
 
 namespace CarManagerV3
 {
+    /// <summary>
+    /// The <c>ImageManager</c> class is responsible for managing car images, including fetching and storing them locally.
+    /// </summary>
     internal class ImageManager
     {
-
+        /// <summary>
+        /// Initializes the image folder by creating it if it does not exist.
+        /// </summary>
         public static void InitializeImageFolder()
         {
             string path = "images";
@@ -19,6 +24,11 @@ namespace CarManagerV3
             }
         }
 
+        /// <summary>
+        /// Generates the image path for a given car based on its attributes.
+        /// </summary>
+        /// <param name="car">The car.</param>
+        /// <returns>The image path for this Car.</returns>
         public static string GetImagePath(Car car)
         {
             string basePath = "images/";
@@ -26,6 +36,11 @@ namespace CarManagerV3
             return basePath + fileName;
         }
 
+        /// <summary>
+        /// Gets the image for a given car, fetching it if necessary.
+        /// </summary>
+        /// <param name="car">The car.</param>
+        /// <returns>The <see cref="Image"/> object for the car.</returns>
         public static Image GetImage(Car car)
         {
             InitializeImageFolder();
@@ -43,11 +58,16 @@ namespace CarManagerV3
 
         }
 
+        /// <summary>
+        /// Fetches an image for a Car from https://cdn.imagin.studio/getimage if it does not already exist locally and saves it to images/<c>Make_Model_Year_Color.webp</>.
+        /// If the image cannot be fetched, a placeholder image is used instead.
+        /// Uses example customer id "hrjavascript-mastery", because they wouldn't give me one. Stole this from a tutorial page. :)
+        /// </summary>
+        /// <param name="car">The car.</param>
         public static void FetchImage(Car car)
         {
             // Fetch the image from https://cdn.imagin.studio/getimage and save it to images/Make_Model_Year.webp
             // use params like this: ?customer=hrjavascript-mastery&zoomType=fullscreen&make={make}&modelFamily={model}&modelYear={year}&angle=front&paintDescription={color}&fileType=png
-
             // check if the image already exists
             string path = GetImagePath(car);
             if (System.IO.File.Exists(path))
@@ -55,7 +75,7 @@ namespace CarManagerV3
                 return;
             }
             string url = $"https://cdn.imagin.studio/getimage?customer=hrjavascript-mastery&zoomType=fullscreen&make={car.Make}&modelFamily={car.Model}&modelYear={car.Year}&angle=front&paintDescription={car.Color}&fileType=png";
-            //add Referer header
+            //add Referer header to avoid 403 error
             using (var client = new System.Net.WebClient())
             {
                 client.Headers.Add("Referer", "http://localhost");
@@ -65,7 +85,7 @@ namespace CarManagerV3
                 }
                 catch 
                 {
-                    // if error, use no_image_available.png
+                    // if error, use fallback image no_image_available.png
                     System.IO.File.Copy("images/no_image_available.png", path);
                 }
             }

CarManagerV3/MainForm.cs

@@ -19,6 +19,7 @@ namespace CarManagerV3
         {
             InitializeComponent();
 
+            // Open the most recent file if it exists. Otherwise, use default filepath.
             List<string> recentFiles = SafeManager.GetRecentPaths();
             if(recentFiles.Count > 0)
             {
@@ -33,6 +34,11 @@ namespace CarManagerV3
 
         }
 
+        /// <summary>
+        /// Refreshes the cars displayed in the flow layout panel.
+        /// </summary>
+        /// <param name="_cars">The cars.</param>
+        /// <param name="updateGlobal">if set to <c>true</c> [update global].</param>
         private async void refreshCars(List<Car> _cars, bool updateGlobal = true)
         {
 
@@ -143,6 +149,13 @@ namespace CarManagerV3
             detailsForm.ShowDialog();
         }
 
+        /// <summary>
+        /// Filters the cars by a search query.
+        /// </summary>
+        /// <param name="query">The search query.</param>
+        /// <returns>
+        /// A list of <see cref="Car"/> objects that match the query.
+        /// </returns>
         List<Car> filterCarsByQuery(string query)
         {
             List<Car> results = new List<Car>();
@@ -156,6 +169,10 @@ namespace CarManagerV3
             return results;
         }
 
+        /// <summary>
+        /// Searches the list of cars by a query and refreshes the display.
+        /// </summary>
+        /// <param name="query">The query.</param>
         void searchList(string query)
         {
             List<Car> results = filterCarsByQuery(query);
@@ -327,11 +344,15 @@ namespace CarManagerV3
             }
         }
 
+        // TODO: Unbind and remove this.
         private void recentFilesToolStripMenuItem_Click(object sender, EventArgs e)
         {
             
         }
 
+        /// <summary>
+        /// Refreshes the recently opened files menu.
+        /// </summary>
         private void refreshRecents()
         {
             recentFilesToolStripMenuItem.DropDownItems.Clear();

CarManagerV3/Properties/Resources.Designer.cs

@@ -8,8 +8,8 @@
 // </auto-generated>
 //------------------------------------------------------------------------------
 
-namespace CarManagerV2.Properties
+namespace CarManagerV3.Properties {
-{
+    using System;
     
     
     /// <summary>
@@ -19,32 +19,27 @@ namespace CarManagerV2.Properties
     // class via a tool like ResGen or Visual Studio.
     // To add or remove a member, edit your .ResX file then rerun ResGen
     // with the /str option, or rebuild your VS project.
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    internal class Resources
+    internal class Resources {
-    {
         
         private static global::System.Resources.ResourceManager resourceMan;
         
         private static global::System.Globalization.CultureInfo resourceCulture;
         
         [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
-        internal Resources()
+        internal Resources() {
-        {
         }
         
         /// <summary>
         ///   Returns the cached ResourceManager instance used by this class.
         /// </summary>
         [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static global::System.Resources.ResourceManager ResourceManager
+        internal static global::System.Resources.ResourceManager ResourceManager {
-        {
+            get {
-            get
+                if (object.ReferenceEquals(resourceMan, null)) {
-            {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("CarManagerV3.Properties.Resources", typeof(Resources).Assembly);
-                if ((resourceMan == null))
-                {
-                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("CarManagerV2.Properties.Resources", typeof(Resources).Assembly);
                     resourceMan = temp;
                 }
                 return resourceMan;
@@ -56,14 +51,11 @@ namespace CarManagerV2.Properties
         ///   resource lookups using this strongly typed resource class.
         /// </summary>
         [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static global::System.Globalization.CultureInfo Culture
+        internal static global::System.Globalization.CultureInfo Culture {
-        {
+            get {
-            get
-            {
                 return resourceCulture;
             }
-            set
+            set {
-            {
                 resourceCulture = value;
             }
         }

CarManagerV3/Properties/Settings.Designer.cs

@@ -8,21 +8,17 @@
 // </auto-generated>
 //------------------------------------------------------------------------------
 
-namespace CarManagerV2.Properties
+namespace CarManagerV3.Properties {
-{
     
     
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "17.14.0.0")]
-    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
-    {
         
         private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
         
-        public static Settings Default
+        public static Settings Default {
-        {
+            get {
-            get
-            {
                 return defaultInstance;
             }
         }

CarManagerV3/SafeManager.cs

@@ -8,10 +8,20 @@ using System.Threading.Tasks;
 
 namespace CarManagerV3
 {
+    /// <summary>
+    /// Handles safe reading and writing of car data to files.
+    /// </summary>
     internal class SafeManager
     {
+        /// <summary>
+        /// The path of the txt file that contains recently opened file paths.
+        /// </summary>
         private static readonly string recentPathsFile = "recent_paths.txt";
 
+        /// <summary>
+        /// Initializes a file at a specified path if it does not already exist.
+        /// </summary>
+        /// <param name="path">The path.</param>
         public static void InitializeFile(string path)
         {
             if (!File.Exists(@path))
@@ -24,6 +34,13 @@ namespace CarManagerV3
             }
         }
 
+        /// <summary>
+        /// Reads cars from a specified file path.
+        /// </summary>
+        /// <param name="path">The path.</param>
+        /// <returns>
+        /// A <see cref="List{Car}"/> containing the cars read from the file.
+        /// </returns>
         public static List<Car> ReadCars(string path)
         {
             List<Car> cars = new List<Car>();
@@ -40,6 +57,11 @@ namespace CarManagerV3
             return cars;
         }
 
+        /// <summary>
+        /// Saves the cars to a specified file path.
+        /// </summary>
+        /// <param name="path">The path.</param>
+        /// <param name="cars">A <see cref="List{Car}"/> containing all cars to save.</param>
         public static void SaveCars(string path, List<Car> cars)
         {
             using (StreamWriter writer = new StreamWriter(@path))
@@ -51,11 +73,15 @@ namespace CarManagerV3
             }
         }
 
+        /// <summary>
+        /// Adds a file path to the recent paths list.
+        /// If a path is already in the list, it is moved to the top.
+        /// Otherwise, it is added to the top.
+        /// Keeps only the 5 most recent paths.
+        /// </summary>
+        /// <param name="path">The path.</param>
         public static void AddRecentPath(string path)
         {
-            // Read the file, if the path is not already in the file, add it to the top.
-            // If it is already in the file, move it to the top.
-            // Keep only the 5 most recent paths.
             List<string> paths = new List<string>();
             if (File.Exists(recentPathsFile))
             {
@@ -83,6 +109,12 @@ namespace CarManagerV3
             }
         }
 
+        /// <summary>
+        /// Gets the recently opened file paths.
+        /// </summary>
+        /// <returns>
+        /// A <see cref="List{String}"/> containing the recent file paths.
+        /// </returns>
         public static List<string> GetRecentPaths()
         {
             List<string> paths = new List<string>();

CarManagerV3/StateManager.cs

@@ -0,0 +1,117 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CarManagerV3
+{
+    // Could be made non-static / non-singleton if multiple collections are needed in the future. Not likely though.
+    /// <summary>
+    /// The <c>StateManager</c> class is responsible for managing the state of the car collection, including adding, removing, updating, and retrieving cars.
+    /// Fully static / singleton at the moment, as only one collection is needed.
+    /// </summary>
+    internal class StateManager
+    {
+        // Initialize global static list of cars
+        static List<Car> cars = new List<Car>();
+        // Initialize default file path for car data.
+        // TODO: If no recent file paths are found, prompt user to select a file path instead of using a hardcoded default in the program folder.
+        static string filePath = "cars.csv";
+
+        /// <summary>
+        /// Gets a car by its identifier.
+        /// </summary>
+        /// <param name="id">The identifier.</param>
+        /// <returns>
+        /// A <see cref="Car"/> object if found; otherwise, null.
+        /// </returns>
+        public static Car GetCarById(int id)
+        {
+            cars = SafeManager.ReadCars(filePath);
+            return cars.FirstOrDefault(c => c.Id == id);
+        }
+
+        /// <summary>
+        /// Public getter and setter for the cars list. Used to have better control over the list.
+        /// </summary>
+        /// <value>
+        /// The cars.
+        /// </value>
+        public static List<Car> Cars { get { return cars; } set { cars = value; } }
+
+        /// <summary>
+        /// Adds a car to the collection.
+        /// </summary>
+        /// <param name="car">The car to add.</param>
+        public static void AddCar(Car car)
+        {
+            cars = SafeManager.ReadCars(filePath);
+            cars.Add(car);
+            SafeManager.SaveCars(filePath, cars);
+        }
+
+        /// <summary>
+        /// Removes a car from the collection.
+        /// </summary>
+        /// <param name="car">The car to remove.</param>
+        public static void RemoveCar(Car car)
+        {
+            cars = SafeManager.ReadCars(filePath);
+            Car existingCar = GetCarById(car.Id);
+            if (existingCar == null) return;
+            cars.Remove(existingCar);
+            SafeManager.SaveCars(filePath, cars);
+        }
+
+        /// <summary>
+        /// Updates a car in the collection. Identifies itself by its Id.
+        /// </summary>
+        /// <remarks>
+        /// If the car's Id has changed during editing, this will not work correctly. Keep Id immutable!
+        /// </remarks>
+        /// <param name="car">The car to update.</param>
+        public static void UpdateCar(Car car)
+        {
+            Car existingCar = GetCarById(car.Id);
+            if (existingCar != null)
+            {
+                int index = cars.IndexOf(existingCar);
+                cars[index] = car;
+                Console.WriteLine("Updated car: " + existingCar.Id);
+                SafeManager.SaveCars(filePath, cars);
+            }
+        }
+
+        /// <summary>
+        /// Creates a new car and adds it to the collection.
+        /// </summary>
+        /// <param name="make">The make.</param>
+        /// <param name="model">The model.</param>
+        /// <param name="year">The year.</param>
+        /// <param name="color">The color.</param>
+        /// <param name="mileage">The mileage.</param>
+        /// <param name="price">The price.</param>
+        /// <returns>
+        /// The newly created <see cref="Car"/> object.
+        /// </returns>
+        public static Car CreateCar(string make, string model, int year, string color, int mileage, decimal price)
+        {
+            cars = SafeManager.ReadCars(filePath);
+            int newId = cars.Count > 0 ? cars.Max(c => c.Id) + 1 : 1;
+            Car newCar = new Car(newId, make, model, year, color, mileage, price);
+            AddCar(newCar);
+            return newCar;
+        }
+
+        /// <summary>
+        /// Sets the file path used for saving and loading car data.
+        /// Called when user selects a new file path.
+        /// </summary>
+        /// <param name="path">The path.</param>
+        public static void setFilePath(string path)
+        {
+            filePath = path;
+        }
+    }
+}

README.md

@@ -0,0 +1,7 @@
+# Car Manager 3
+
+This is a simple school project in C# - Honestly you shouldn't be looking at this if you don't know me.
+
+Hosted on [my own git server](https://git.jaro.digital/frozd/carmanager-3)
+
+Documentation is in the works.