wip prototype pattern on the way.

creational/prototype/PrototypeSample.cs

@@ -1,5 +1,8 @@
 using System;
+using System.Runtime.Serialization.Formatters.Binary;
 using System.Threading.Tasks;
+using System.IO;
+using System.Xml.Serialization;
 
 namespace design_patterns.creational.prototype
 {
@@ -13,7 +16,69 @@ namespace design_patterns.creational.prototype
         public static async Task Run()
         {
             Console.WriteLine("Creational - Prototype");
+            Product p1 = new Product {
+                Name = "Product 1",
+                Details = "details 1",
+                Price = 44.22m,
+                DiscountPercentLevel1 = 5,
+                DiscountPercentLevel2 = 10
+            };
 
+            Console.WriteLine($"p1 -> {p1}");
+
+            // var p2 = p1.DeepCopyWithBinaryFormatter();
+            var p2 = p1.DeepCopyWithXmlFormatter();
+            p2.Name = "Product 2";
+            p2.Price = 11.22m;
+            Console.WriteLine($"p2 -> {p2}");
+        }
+    }
+
+    public static class PrototypeExtensions {
+
+        // deep copy with binaryformatter
+        // ATTENTION ! 
+        // - https://docs.microsoft.com/en-gb/dotnet/standard/serialization/binaryformatter-security-guide
+        // - every type has to be serializable
+        public static T DeepCopyWithBinaryFormatter<T>(this T from) {
+            var formatter = new BinaryFormatter();
+            using(var stream  = new MemoryStream()) {
+                formatter.Serialize(stream, from);
+                stream.Seek(0, SeekOrigin.Begin);
+                return (T)formatter.Deserialize(stream);
+            }
+        }
+
+
+        /// <summary>
+        /// Better alternative for security concern
+        /// </summary>
+        /// <param name="from">original object</param>
+        /// <typeparam name="T">type of original object</typeparam>
+        /// <returns></returns>
+        public static T DeepCopyWithXmlFormatter<T>(this T from) {
+            var serializer = new XmlSerializer(typeof(T));
+            using(var stream  = new MemoryStream()) {
+                serializer.Serialize(stream, from);
+                stream.Seek(0, SeekOrigin.Begin);
+                return (T)serializer.Deserialize(stream);
+            }
+        }
+    }
+
+    // [Serializable]
+    public class Product {
+        public string Name { get; set; }
+        public string Details { get; set; }
+
+        public decimal Price { get; set; }
+        public int DiscountPercentLevel1 { get; set; }
+        public int DiscountPercentLevel2 { get; set; }
+        
+
+        public override string ToString()
+        {
+            return $"{Name} : {Details} : {Price} : {DiscountPercentLevel1} : {DiscountPercentLevel2}";
         }
     }
 }