Added BookBase as base class for book and updated models Book and Boo…

…kExtended to use it.

BookApp/Models/BookBase.cs

@@ -0,0 +1,16 @@
+using System;
+
+/* This class contains the base elements of Book and BookExtended. */
+
+namespace Models
+{
+    public class BookBase
+    {
+        public Guid Id { get; set; }
+        public string Title { get; set; }
+        public string Author { get; set; }
+        public string Content { get; set; }
+        public DateTime CreatedDatetime { get; set; }
+        public Guid UserId { get; set; }
+    }
+}

BookApp/Models/DomainModels/Book.cs

@@ -4,14 +4,10 @@
 using System.Text;
 using System.Threading.Tasks;
 
-namespace Models.DomainModels {
-    public class Book {
-        public Guid Id { get; set; }
-        public string Title { get; set; }
-        public string Author { get; set; }
-        public string Content { get; set; }
-        public DateTime CreatedDatetime { get; set; }
-        public Guid UserId { get; set; }
+namespace Models.DomainModels
+{
+    public class Book : BookBase
+    {
         public User User { get; set; }
     }
 }

BookApp/Models/ExtendedModels/BookExtended.cs

@@ -4,14 +4,10 @@
 using System.Text;
 using System.Threading.Tasks;
 
-namespace Models.ExtendedModels {
-    public class BookExtended {
-        public Guid Id { get; set; }
-        public string Title { get; set; }
-        public string Author { get; set; }
-        public string Content { get; set; }
-        public DateTime CreatedDatetime { get; set; }
-        public Guid UserId { get; set; }
+namespace Models.ExtendedModels
+{
+    public class BookExtended : BookBase
+    {
         public string UserName { get; set; }
         public IEnumerable<BookExtended> MoreUserBooks { get; set; }
     }

BookApp/Models/Models.csproj

@@ -40,6 +40,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="BookBase.cs" />
     <Compile Include="Class1.cs" />
     <Compile Include="DomainModels\Book.cs" />
     <Compile Include="DomainModels\User.cs" />