Finished Overload Methods; Finished Defining Properties

gradebook/src/GradeBook/Book.cs

@@ -6,7 +6,22 @@ namespace GradeBook
     public class Book
     {
         private List<double> grades;
-        public string Name;
+
+        private string name;
+        public string Name
+        {
+            get
+            {
+                return name;
+            }
+            set
+            {
+                if (!String.IsNullOrEmpty(value))
+                {
+                    name = value;   
+                }
+            }
+        }
 
         public Book(string name)
         {
@@ -25,7 +40,7 @@ namespace GradeBook
             }
         }
 
-        public void AddLetterGrade(char letter)
+        public void AddGrade(char letter)
         {
             switch (letter)
             {

gradebook/src/GradeBook/Program.cs

@@ -30,6 +30,7 @@ namespace GradeBook
                     {
                         Console.WriteLine($"Received: {input}");
                         book.AddGrade(Convert.ToDouble(input));   
+                        // book.AddGrade('A');
                     }
                     catch (ArgumentException ex)
                     {