Merge branch 'main' of https://github.com/MicrosoftLearning/mslearn-develop-oop-csharp

Author: ChrisHowd

DownloadableCodeProjects/LP2_implement_interfaces/Interfaces_M2/Solution/Classroom.cs

@@ -0,0 +1,24 @@
+public class Classroom : IEnumerable
+{
+    private List students = new List();
+
+    public void AddStudent(Student student)
+    {
+        students.Add(student);
+    }
+
+    public void SortStudentsByAge()
+    {
+        students.Sort(); // Uses the IComparable implementation in Student
+    }
+
+    public IEnumerator GetEnumerator()
+    {
+        return students.GetEnumerator();
+    }
+
+    IEnumerator IEnumerable.GetEnumerator()
+    {
+        return GetEnumerator();
+    }
+}

DownloadableCodeProjects/LP2_implement_interfaces/Interfaces_M2/Solution/IPerson.cs

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+public interface IPerson
+{
+    string Name { get; set; }
+    int Age { get; set; }
+    void DisplayInfo();
+
+    // New property
+    string Role { get; }
+
+    // Default method
+    void Greet()
+    {
+        Console.WriteLine($"Hello, my name is {Name} and I am a {Role}.");
+    }
+}

DownloadableCodeProjects/LP2_implement_interfaces/Interfaces_M2/Solution/PersonUtilities.cs

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+public class PersonUtilities
+{
+    public static void PrintPersonDetails(IPerson person)
+    {
+        person.DisplayInfo();
+        person.Greet();
+    }
+}

DownloadableCodeProjects/LP2_implement_interfaces/Interfaces_M2/Solution/Program.cs

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+class Program
+{
+    static void Main(string[] args)
+    {
+        // Create a teacher and students
+        IPerson teacher = new Teacher { Name = "Helen Karu", Age = 35 };
+        IPerson student1 = new Student { Name = "Eba Lencho", Age = 20 };
+        IPerson student2 = new Student { Name = "Frederiek Eppink", Age = 22 };
+
+        // Use the utility class to print details
+        PersonUtilities.PrintPersonDetails(teacher);
+        PersonUtilities.PrintPersonDetails(student1);
+
+        // Create a classroom and add students
+        Classroom classroom = new Classroom();
+        classroom.AddStudent((Student)student1);
+        classroom.AddStudent((Student)student2);
+
+        // Sort students by age
+        classroom.SortStudentsByAge();
+
+        Console.WriteLine("\nSorted Students by Age:");
+        foreach (var student in classroom)
+        {
+            student.DisplayInfo();
+        }
+    }
+}

DownloadableCodeProjects/LP2_implement_interfaces/Interfaces_M2/Solution/Student.cs

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+public class Student : IPerson, IComparable
+{
+    public string Name { get; set; } = string.Empty;
+    public int Age { get; set; } = 0;
+
+    public string Role => "Student";
+
+    public void DisplayInfo()
+    {
+        Console.WriteLine($"Student Name: {Name}, Age: {Age}");
+    }
+
+    public int CompareTo(Student? other)
+    {
+        if (other == null) return 1;
+        return this.Age.CompareTo(other.Age);
+    }
+}

DownloadableCodeProjects/LP2_implement_interfaces/Interfaces_M2/Solution/Teacher.cs

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+public class Teacher : IPerson
+{
+    public string Name { get; set; } = string.Empty;
+    public int Age { get; set; } = 0;
+
+    public string Role => "Teacher";
+
+    public void DisplayInfo()
+    {
+        Console.WriteLine($"Teacher Name: {Name}, Age: {Age}");
+    }
+
+    public void Greet()
+    {
+        Console.WriteLine($"Hello, I am {Name}, a teacher with {Age} years of experience.");
+    }
+}