From c21c3e946f69bfdffd29410405c462c53470bc33 Mon Sep 17 00:00:00 2001
From: skalenko <38497263+skalenko@users.noreply.github.com>
Date: Sun, 3 Mar 2019 16:21:48 +0300
Subject: [PATCH 1/4] Update Program.cs

---
 Program.cs | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/Program.cs b/Program.cs
index b9247f7..6c96cfb 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1,4 +1,7 @@
-namespace Events
+using System;
+
+
+namespace Events
 {
     class Program
     {
@@ -18,20 +21,36 @@ internal Product Product
         static void Main(string[] args)
         {
             Product product = new Product("Some product name", 0);
-            
             /* 
              * TODO #6 Назначить обработчики событий в текущем контексте 
              */
+            product.nameChanged += onNameChanged;
+            product.priceChanged += onPriceChanged;
 
             /*
              * TODO #7 Выполнить с экземпляром класса Product действия, 
              * приводящие к возникновению описанных Вами событий
              */
+
+            product.Name = "NewNewNew";
+            product.Price = 1000;
         }
 
         /* 
          * TODO #8 Добавить определение обработчиков событий 
          */
 
+        private static void onNameChanged(object sender, ProductEventArgs e)
+        {
+            Product product = sender as Product;
+            Console.WriteLine("Name has been changed from " + e.oldName + " to " + product.Name);
+        }
+
+        private static void onPriceChanged(object sender, ProductEventArgs e)
+        {
+            Product product = sender as Product;
+            Console.WriteLine("Price has been changed from " + e.oldPrice + " to " + product.Price);
+        }
+
     }
 }

From 9836c6c64b00aaebd1e6acdadac94b2f334c64c8 Mon Sep 17 00:00:00 2001
From: skalenko <38497263+skalenko@users.noreply.github.com>
Date: Sun, 3 Mar 2019 16:22:12 +0300
Subject: [PATCH 2/4] done

---
 Product.cs | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Product.cs b/Product.cs
index f68c8c9..9fba648 100644
--- a/Product.cs
+++ b/Product.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 
 namespace Events
 {
@@ -32,11 +32,16 @@ public string Name
             get { return name; }
             set
             {
+                ProductEventArgs arg = new ProductEventArgs(name);
                 name = value;
                 /* 
                  * TODO #4 Инициировать уведомление об 
                  * изменении наименования
                  */
+                if (nameChanged != null)
+                {
+                    nameChanged(this, arg);
+                }
             }
         }
         /// <summary>
@@ -47,11 +52,16 @@ public decimal Price
             get { return price; }
             set
             {
+                ProductEventArgs arg = new ProductEventArgs(price);
                 price = value;
                 /*
                  * TODO #5 Инициировать уведомление об 
                  * изменении стоимости
                  */
+                if (priceChanged != null)
+                {
+                    priceChanged(this, arg);
+                }
             }
         }
 
@@ -62,6 +72,8 @@ public decimal Price
         /* 
          * TODO #3 Добавить определение событий
          */
+        public event EventHandler<ProductEventArgs> nameChanged;
+        public event EventHandler<ProductEventArgs> priceChanged;
 
         #endregion
 

From 8adf3d011d0de675b8d42eeb9474904bde2539c5 Mon Sep 17 00:00:00 2001
From: skalenko <38497263+skalenko@users.noreply.github.com>
Date: Sun, 3 Mar 2019 16:22:27 +0300
Subject: [PATCH 3/4] done

---
 ProductEventArgs.cs | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/ProductEventArgs.cs b/ProductEventArgs.cs
index a79a6d6..4e4fc89 100644
--- a/ProductEventArgs.cs
+++ b/ProductEventArgs.cs
@@ -1,4 +1,6 @@
-namespace Events
+using System;
+
+namespace Events
 {
     /// <summary>
     /// Класс, который служит для передачи аргументов 
@@ -8,11 +10,23 @@
     /*
      * TODO #1 Закончить определение класса ProductEventArgs
      */
-    class ProductEventArgs
+    class ProductEventArgs : EventArgs
     {
         /* 
          * TODO #2 Добавить определение необходимых компонент 
          * класса ProductEventArgs
          */
+        public string oldName { get; }
+        public decimal oldPrice { get; }
+
+        public ProductEventArgs(string oldName)
+        {
+            this.oldName = oldName;
+        }
+
+        public ProductEventArgs(decimal oldPrice)
+        {
+            this.oldPrice = oldPrice;
+        }
     }
 }

From 4b37b23204a404dd6c797cbb3c617cce4bef35d6 Mon Sep 17 00:00:00 2001
From: skalenko <38497263+skalenko@users.noreply.github.com>
Date: Sun, 3 Mar 2019 16:22:45 +0300
Subject: [PATCH 4/4] done

---
 Program.cs | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Program.cs b/Program.cs
index 6c96cfb..5bc3372 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1,6 +1,5 @@
 using System;
 
-
 namespace Events
 {
     class Program