Initial commit

BuildingDirectory/Model/BusinessCard.cs

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+namespace BuildingDirectory.Model;
+
+/// <summary>
+///     Represents a business card of a company employee
+/// </summary>
+public sealed class BusinessCard
+{
+    /// <summary>
+    ///  Creates a new instance of a business card
+    /// </summary>
+    /// <param name="firstName">First name of the employee</param>
+    /// <param name="lastName">Last name of the employee</param>
+    /// <param name="department">Department the employee works at</param>
+    /// <param name="phoneNumber">Phone number of the employee</param>
+    /// <param name="eMail">E-Mail address of the employee</param>
+    public BusinessCard(string firstName, string lastName, string department, string? phoneNumber, string eMail)
+    {
+        FirstName = firstName;
+        LastName = lastName;
+        Department = department;
+        PhoneNumber = phoneNumber;
+        EMail = eMail;
+    }
+
+    /// <summary>
+    ///     Gets the first name of the employee
+    /// </summary>
+    public string FirstName { get; }
+    
+    /// <summary>
+    ///     Gets the last name of the employee
+    /// </summary>
+    public string LastName { get; }
+    
+    /// <summary>
+    ///     Gets the name of the department the employee works at
+    /// </summary>
+    public string Department { get; }
+    
+    /// <summary>
+    ///     Gets the phone number of the employee
+    /// </summary>
+    public string? PhoneNumber { get; }
+    
+    /// <summary>
+    ///     Gets the E-Mail address of the employee
+    /// </summary>
+    public string EMail { get; }
+
+    /// <summary>
+    ///     Determines if this object is equal to another
+    /// </summary>
+    /// <param name="obj">Other object to compare to</param>
+    /// <returns>True if the objects are equal; false otherwise</returns>
+    // TODO
+    public override bool Equals(object? obj) 
+        => false;
+
+    /// <summary>
+    ///     Calculates the hash code for this object
+    /// </summary>
+    /// <returns>Numeric hash code</returns>
+    // TODO
+    public override int GetHashCode() => -1;
+}

BuildingDirectory/Model/Company.cs

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+namespace BuildingDirectory.Model;
+
+/// <summary>
+///     Represents a company with employees
+/// </summary>
+public sealed class Company
+{
+    private readonly MyDictionary<BusinessCard, int> _employeeRooms;
+
+    /// <summary>
+    ///     Creates a new instance of a company with the given name and the employees together
+    ///     with their room numbers.
+    ///     Employees are represented/identified by their <see cref="BusinessCard"/>
+    /// </summary>
+    /// <param name="employeeRooms">Employees and assigned room numbers</param>
+    /// <param name="name">Name of the company</param>
+    public Company(MyDictionary<BusinessCard, int> employeeRooms, string name)
+    {
+        _employeeRooms = employeeRooms;
+        Name = name;
+    }
+
+    /// <summary>
+    ///     Gets the name of the company
+    /// </summary>
+    public string Name { get; }
+    
+    /// <summary>
+    ///     Gets the number of employees working for the company 
+    /// </summary>
+    // TODO
+    public int NoOfEmployees => -1;
+
+    /// <summary>
+    ///     Returns the room number the clerk identified by the provided
+    ///     <see cref="BusinessCard"/> resides at - if known
+    /// </summary>
+    /// <param name="businessCard">Identification of the employee</param>
+    /// <returns>Room number if found; null otherwise</returns>
+    public int? AskForRoom(BusinessCard businessCard)
+    {
+        // TODO
+        return -1;
+    }
+    
+}

BuildingDirectory/Model/Floor.cs

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+namespace BuildingDirectory.Model;
+
+/// <summary>
+///     Represents a floor in a building
+/// </summary>
+public enum Floor
+{
+    Ground,
+    First,
+    Second,
+    Third
+}