Adding interface Tasks

InterfacesTask.cs

@@ -0,0 +1,173 @@
+namespace DependencyInjections
+{
+    public interface IPayment
+    {
+        void ProcessPayment(decimal amount);
+    }
+
+    public class CreditCardPayment : IPayment
+    {
+        public void ProcessPayment(decimal amount)
+        {
+            Console.WriteLine($"Processing credit card payment for {amount} kr.");
+        }
+    }
+
+    public class PayPalPayment : IPayment
+    {
+        public void ProcessPayment(decimal amount)
+        {
+            Console.WriteLine($"Processing PayPal payment of {amount} kr.");
+        }
+    }
+
+    public interface IPrintable
+    {
+        void Print();
+    }
+
+    public class PrintInvoice : IPrintable
+    {
+        public void Print()
+        {
+            Console.WriteLine($@"
+                ====== INVOICE ======
+                
+                1 stk båd 1299 kr.
+
+                Total 1299 kr.
+            ");
+        }
+    }
+
+    public class PrintReport : IPrintable
+    {
+        public void Print()
+        {
+            Console.WriteLine("Report printing...");
+        }
+    }
+
+    public class PrintLetter : IPrintable
+    {
+        public void Print()
+        {
+            Console.WriteLine("Printing letter...");
+        }
+    }
+
+    public interface IDriveable
+    {
+        void Start();
+        void Stop();
+    }
+
+    public class Vehicle
+    {
+        public string brand { get; set; }
+    }
+
+    public class Car : Vehicle, IDriveable
+    {
+        public bool started = false;
+
+        public Car(string brand)
+        {
+            this.brand = brand;
+        }
+
+        public void Start()
+        {
+            this.started = true;
+            Console.WriteLine($"Starting {this.brand}");
+        }
+
+        public void Stop()
+        {
+            this.started = false;
+            Console.WriteLine($"Stopping {this.brand}");
+        }
+    }
+
+    public class Motorcycle : Vehicle, IDriveable
+    {
+        public bool started = false;
+
+        public Motorcycle(string brand)
+        {
+            this.brand = brand;
+        }
+
+        public void Start()
+        {
+            this.started = true;
+            Console.WriteLine($"Starting {this.brand}");
+        }
+
+        public void Stop()
+        {
+            this.started = false;
+            Console.WriteLine($"Stopping {this.brand}");
+        }
+    }
+
+    public interface IMakeSound
+    {
+        void MakeSound();
+    }
+
+    public class Dog : IMakeSound
+    {
+        public void MakeSound()
+        {
+            Console.WriteLine("Woof");
+        }
+    }
+
+    public class Cat : IMakeSound
+    {
+        public void MakeSound()
+        {
+            Console.WriteLine("Meow");
+        }
+    }
+
+    public class Cow : IMakeSound
+    {
+        public void MakeSound()
+        {
+            Console.WriteLine("Moo");
+        }
+    }
+
+    public interface IWeapon
+    {
+        int Attack();
+    }
+
+    public class Sword : IWeapon
+    {
+        public int Attack()
+        {
+            return 10;
+        }
+    }
+
+    public class Bow : IWeapon
+    {
+        public int Attack()
+        {
+            return new Random().Next(5, 16);
+        }
+    }
+
+    public class Staff : IWeapon
+    {
+        public int MagicPower { get; set; } = 10;
+
+        public int Attack()
+        {
+            return MagicPower;
+        }
+    }
+}