From f7ef36beabbefa92e973c1f3c031ab71d5e88c2c Mon Sep 17 00:00:00 2001
From: Jason Zhu <jasonzhuyq@outlook.com>
Date: Mon, 22 Feb 2021 11:53:59 +0000
Subject: [PATCH] Finished Deriving from a Base Class

---
 gradebook/src/GradeBook/Book.cs    | 22 +++++++++++++++-------
 gradebook/src/GradeBook/Program.cs |  8 --------
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/gradebook/src/GradeBook/Book.cs b/gradebook/src/GradeBook/Book.cs
index d45358e..e2f704b 100644
--- a/gradebook/src/GradeBook/Book.cs
+++ b/gradebook/src/GradeBook/Book.cs
@@ -5,20 +5,28 @@ namespace GradeBook
 {
     public delegate void GradeAddedDelegate(object sender, EventArgs args);
 
-    public class Book
+    public class NamedObject
+    {
+
+        public NamedObject(string name)
+        {
+            Name = name;
+        }
+        public string Name
+        {
+            get;
+            set;
+        }
+    }
+    public class Book : NamedObject
     {
         private List<double> grades;
 
         readonly string category;
 
         private string name;
-        public string Name
-        {
-            get;
-            set;
-        }
 
-        public Book(string name)
+        public Book(string name) : base(name)
         {
             Name = name;
             grades = new List<double>();
diff --git a/gradebook/src/GradeBook/Program.cs b/gradebook/src/GradeBook/Program.cs
index 54de553..2134bdd 100644
--- a/gradebook/src/GradeBook/Program.cs
+++ b/gradebook/src/GradeBook/Program.cs
@@ -8,16 +8,8 @@ namespace GradeBook
         static void Main(string[] args)
         {
 
-            // var book = new Book("Scott's Grade Book");
-            // book.AddGrade(89.1);
-            // book.AddGrade(90.5);
-            // book.AddGrade(87.2);
-
             var book = new Book("Jason's Grade Book");
             book.GradeAdded += OnGradeAdded;
-            book.GradeAdded += OnGradeAdded;
-            book.GradeAdded -= OnGradeAdded;
-            book.GradeAdded -= OnGradeAdded;
 
             string input;