diff --git a/Tutorial/GacUI_Controls/AddressBook/Main.cpp b/Tutorial/GacUI_Controls/AddressBook/Main.cpp
index 22f2322d..b9c15ff6 100644
--- a/Tutorial/GacUI_Controls/AddressBook/Main.cpp
+++ b/Tutorial/GacUI_Controls/AddressBook/Main.cpp
@@ -12,7 +12,8 @@ int CALLBACK WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLi
 }
 
 Ptr<GuiImageData> folderImage;
-Ptr<GuiImageData> contactImage;
+Ptr<GuiImageData> contactBigImage;
+Ptr<GuiImageData> contactSmallImage;
 
 class ViewModel;
 
@@ -23,6 +24,7 @@ protected:
 	ICategory*									parent;
 	WString										name;
 	list::ObservableList<Ptr<ICategory>>		folders;
+	list::ObservableList<Ptr<IContact>>			contacts;
 
 public:
 	Category(ICategory* _parent)
@@ -52,7 +54,66 @@ public:
 
 	Ptr<IValueObservableList> GetContacts()override
 	{
-		return nullptr;
+		return contacts.GetWrapper();
+	}
+};
+
+class Contact : public Object, public IContact
+{
+protected:
+	Category*									category;
+	WString										name;
+	DateTime									birthday;
+	WString										phone;
+	WString										address;
+
+public:
+	Contact(Category* _category)
+		:category(_category)
+	{
+	}
+
+	Category* GetCategory()
+	{
+		return category;
+	}
+
+	WString GetName()override
+	{
+		return name;
+	}
+
+	Ptr<GuiImageData> GetBigImage()override
+	{
+		return contactBigImage;
+	}
+
+	Ptr<GuiImageData> GetSmallImage()override
+	{
+		return contactSmallImage;
+	}
+
+	DateTime GetBirthday()override
+	{
+		return birthday;
+	}
+
+	WString GetPhone()override
+	{
+		return phone;
+	}
+
+	WString GetAddress()
+	{
+		return address;
+	}
+
+	void Update(WString _name, DateTime _birthday, WString _phone, WString _address)override
+	{
+		name = _name;
+		birthday = _birthday;
+		phone = _phone;
+		address = _address;
 	}
 };
 
@@ -108,6 +169,7 @@ class ViewModel : public Object, public IViewModel
 protected:
 	Ptr<RootCategory>							rootCategory;
 	Ptr<ICategory>								selectedCategory;
+	Ptr<IContact>								selectedContact;
 
 public:
 	ViewModel()
@@ -134,6 +196,20 @@ public:
 		}
 	}
 
+	Ptr<IContact> GetSelectedContact()override
+	{
+		return selectedContact;
+	}
+
+	void SetSelectedContact(Ptr<IContact> value)override
+	{
+		if (selectedContact != value)
+		{
+			selectedContact = value;
+			SelectedContactChanged();
+		}
+	}
+
 	void AddCategory(WString name)
 	{
 		if (auto current = dynamic_cast<Category*>(selectedCategory.Obj()))
@@ -152,6 +228,28 @@ public:
 			SetSelectedCategory(nullptr);
 		}
 	}
+	
+	Ptr<IContact> CreateContact()override
+	{
+		if (auto parent = dynamic_cast<Category*>(selectedCategory.Obj()))
+		{
+			return new Contact(parent);
+		}
+		return nullptr;
+	}
+
+	void AddContact(vl::Ptr<demo::IContact> contact)override
+	{
+		dynamic_cast<Contact*>(contact.Obj())->GetCategory()->contacts.Add(contact);
+	}
+
+	void RemoveContact()override
+	{
+		if (auto contact = dynamic_cast<Contact*>(selectedContact.Obj()))
+		{
+			contact->GetCategory()->contacts.Remove(selectedContact.Obj());
+		}
+	}
 };
 
 void GuiMain()
@@ -163,12 +261,14 @@ void GuiMain()
 		GetResourceManager()->SetResource(L"Resource", resource);
 
 		folderImage = resource->GetImageByPath(L"Images/Folder");
-		contactImage = resource->GetImageByPath(L"Images/Contact");
+		contactBigImage = resource->GetImageByPath(L"Images/ContactBig");
+		contactSmallImage = resource->GetImageByPath(L"Images/ContactSmall");
 	}
 	MainWindow window(new ViewModel);
 	window.MoveToScreenCenter();
 	GetApplication()->Run(&window);
 
 	folderImage = nullptr;
-	contactImage = nullptr;
+	contactBigImage = nullptr;
+	contactSmallImage = nullptr;
 }
\ No newline at end of file
diff --git a/Tutorial/GacUI_Controls/AddressBook/UI/Contact.png b/Tutorial/GacUI_Controls/AddressBook/UI/ContactBig.png
similarity index 100%
rename from Tutorial/GacUI_Controls/AddressBook/UI/Contact.png
rename to Tutorial/GacUI_Controls/AddressBook/UI/ContactBig.png
diff --git a/Tutorial/GacUI_Controls/AddressBook/UI/ContactSmall.png b/Tutorial/GacUI_Controls/AddressBook/UI/ContactSmall.png
new file mode 100644
index 00000000..b1382443
Binary files /dev/null and b/Tutorial/GacUI_Controls/AddressBook/UI/ContactSmall.png differ
diff --git a/Tutorial/GacUI_Controls/AddressBook/UI/Resource.xml b/Tutorial/GacUI_Controls/AddressBook/UI/Resource.xml
index 7fd8a6e3..6964ac1d 100644
--- a/Tutorial/GacUI_Controls/AddressBook/UI/Resource.xml
+++ b/Tutorial/GacUI_Controls/AddressBook/UI/Resource.xml
@@ -15,43 +15,76 @@
 
   <Script>
     <Workflow-ViewModel>
-      module viewmodel;
+      <![CDATA[
+        module viewmodel;
 
-      using system::*;
+        using system::*;
 
-      namespace demo
-      {
-        interface ICategory
+        namespace demo
         {
-          func GetParent() : ICategory*;
-          prop Parent : ICategory* {GetParent}
+          interface IContact
+          {
+            func GetName() : string;
+            prop Name : string {GetName}
+          
+            func GetBigImage() : presentation::GuiImageData^;
+            prop BigImage : presentation::GuiImageData^ {GetBigImage}
+          
+            func GetSmallImage() : presentation::GuiImageData^;
+            prop SmallImage : presentation::GuiImageData^ {GetSmallImage}
+            
+            func GetBirthday() : DateTime;
+            prop Birthday : DateTime {GetBirthday}
+            
+            func GetPhone() : string;
+            prop Phone : string {GetPhone}
+            
+            func GetAddress() : string;
+            prop Address : string {GetAddress}
+            
+            func Update(name : string, birthday : DateTime, phone : string, address : string) : void;
+          }
+      
+          interface ICategory
+          {
+            func GetParent() : ICategory*;
+            prop Parent : ICategory* {GetParent}
         
-          func GetName() : string;
-          prop Name : string {GetName}
+            func GetName() : string;
+            prop Name : string {GetName}
           
-          func GetImage() : presentation::GuiImageData^;
-          prop Image : presentation::GuiImageData^ {GetImage}
+            func GetImage() : presentation::GuiImageData^;
+            prop Image : presentation::GuiImageData^ {GetImage}
 
-          func GetFolders() : ObservableList^;
-          prop Folders : ObservableList^ {GetFolders}
+            func GetFolders() : ObservableList^;
+            prop Folders : ObservableList^ {GetFolders}
 
-          func GetContacts() : ObservableList^;
-          prop Contacts : ObservableList^ {GetContacts}
-        }
+            func GetContacts() : ObservableList^;
+            prop Contacts : ObservableList^ {GetContacts}
+          }
         
-        interface IViewModel
-        {
-          func GetRootCategory() : ICategory^;
+          interface IViewModel
+          {
+            func GetRootCategory() : ICategory^;
           
-          func GetSelectedCategory() : ICategory^;
-          func SetSelectedCategory(value : ICategory^) : void;
-          event SelectedCategoryChanged();
-          prop SelectedCategory : ICategory^ {GetSelectedCategory, SetSelectedCategory : SelectedCategoryChanged}
+            func GetSelectedCategory() : ICategory^;
+            func SetSelectedCategory(value : ICategory^) : void;
+            event SelectedCategoryChanged();
+            prop SelectedCategory : ICategory^ {GetSelectedCategory, SetSelectedCategory : SelectedCategoryChanged}
+            
+            func GetSelectedContact() : IContact^;
+            func SetSelectedContact(value : IContact^) : void;
+            event SelectedContactChanged();
+            prop SelectedContact : IContact^ {GetSelectedContact, SetSelectedContact : SelectedContactChanged}
           
-          func AddCategory(name : string) : void;
-          func RemoveCategory() : void;
+            func AddCategory(name : string) : void;
+            func RemoveCategory() : void;
+            func CreateContact() : IContact^;
+            func AddContact(contact : IContact^) : void;
+            func RemoveContact() : void;
+          }
         }
-      }
+      ]]>
     </Workflow-ViewModel>
   </Script>
 
@@ -61,7 +94,8 @@
     <Image content="File" name="Delete">Delete.png</Image>
 
     <Image content="File" name="Folder">Folder.png</Image>
-    <Image content="File" name="Contact">Contact.png</Image>
+    <Image content="File" name="ContactBig">ContactBig.png</Image>
+    <Image content="File" name="ContactSmall">ContactSmall.png</Image>
     <Image content="File" name="Edit">Edit.png</Image>
     
     <Image content="File" name="BigIcon">ListView_Big.png</Image>
@@ -102,17 +136,36 @@
             </ev.Executed-eval>
           </ToolstripCommand>
           <ToolstripCommand ref.Name="commandDeleteFolder" Image-uri="res://Images/Delete">
-            <att.Enabled-bind>ViewModel.SelectedCategory is null ? false : ViewModel.SelectedCategory.Parent is not null</att.Enabled-bind>
-            <ev.Executed-eval>{ ViewModel.RemoveCategory(); }</ev.Executed-eval>
+            <att.Enabled-bind>ViewModel.SelectedCategory.Parent is not null ?? false</att.Enabled-bind>
+            <ev.Executed-eval>
+              <![CDATA[
+                {
+                  ViewModel.RemoveCategory();
+                }
+              ]]>
+            </ev.Executed-eval>
           </ToolstripCommand>
           <ToolstripCommand ref.Name="commandNewContact" Image-uri="res://Images/NewContact">
-            <ev.Executed>commandNewContact_Executed</ev.Executed>
+            <att.Enabled-bind>ViewModel.SelectedCategory is not null</att.Enabled-bind>
+            <ev.Executed-eval>
+              <![CDATA[
+                {
+                }
+              ]]>
+            </ev.Executed-eval>
           </ToolstripCommand>
           <ToolstripCommand ref.Name="commandDeleteContact" Image-uri="res://Images/Delete">
-            <ev.Executed>commandDeleteContact_Executed</ev.Executed>
+            <att.Enabled-bind>ViewModel.SelectedContact is not null</att.Enabled-bind>
+            <ev.Executed-eval>
+              <![CDATA[
+                {
+                  ViewModel.RemoveContact();
+                }
+              ]]>
+            </ev.Executed-eval>
           </ToolstripCommand>
 
-          <ToolstripCommand ref.Name="commandBigIcon" Image-uri="res://Images/BigIcon">
+          <ToolstripCommand ref.Name="commandBigIcon" Image-uri="res://Images/BigIcon" Selected="true">
             <ev.Executed>commandBigIcon_Executed</ev.Executed>
           </ToolstripCommand>
           <ToolstripCommand ref.Name="commandSmallIcon" Image-uri="res://Images/SmallIcon">
diff --git a/Tutorial/GacUI_Controls/AddressBook/UI/Source/DemoPartialClasses.cpp b/Tutorial/GacUI_Controls/AddressBook/UI/Source/DemoPartialClasses.cpp
index 47dad4f7..902e1478 100644
--- a/Tutorial/GacUI_Controls/AddressBook/UI/Source/DemoPartialClasses.cpp
+++ b/Tutorial/GacUI_Controls/AddressBook/UI/Source/DemoPartialClasses.cpp
@@ -46,6 +46,7 @@ namespace vl
 		{
 			#define _ ,
 			IMPL_CPP_TYPE_INFO(demo::ICategory)
+			IMPL_CPP_TYPE_INFO(demo::IContact)
 			IMPL_CPP_TYPE_INFO(demo::IViewModel)
 			IMPL_CPP_TYPE_INFO(demo::MainWindow)
 			IMPL_CPP_TYPE_INFO(demo::NewFolderWindow)
@@ -64,15 +65,39 @@ namespace vl
 				CLASS_MEMBER_PROPERTY_READONLY(Contacts, GetContacts)
 			END_CLASS_MEMBER(demo::ICategory)
 
+			BEGIN_CLASS_MEMBER(demo::IContact)
+				CLASS_MEMBER_BASE(vl::reflection::IDescriptable)
+				CLASS_MEMBER_METHOD(GetName, NO_PARAMETER);
+				CLASS_MEMBER_METHOD(GetBigImage, NO_PARAMETER);
+				CLASS_MEMBER_METHOD(GetSmallImage, NO_PARAMETER);
+				CLASS_MEMBER_METHOD(GetBirthday, NO_PARAMETER);
+				CLASS_MEMBER_METHOD(GetPhone, NO_PARAMETER);
+				CLASS_MEMBER_METHOD(GetAddress, NO_PARAMETER);
+				CLASS_MEMBER_METHOD(Update, { L"name" _ L"birthday" _ L"phone" _ L"address" });
+				CLASS_MEMBER_PROPERTY_READONLY(Name, GetName)
+				CLASS_MEMBER_PROPERTY_READONLY(BigImage, GetBigImage)
+				CLASS_MEMBER_PROPERTY_READONLY(SmallImage, GetSmallImage)
+				CLASS_MEMBER_PROPERTY_READONLY(Birthday, GetBirthday)
+				CLASS_MEMBER_PROPERTY_READONLY(Phone, GetPhone)
+				CLASS_MEMBER_PROPERTY_READONLY(Address, GetAddress)
+			END_CLASS_MEMBER(demo::IContact)
+
 			BEGIN_CLASS_MEMBER(demo::IViewModel)
 				CLASS_MEMBER_BASE(vl::reflection::IDescriptable)
 				CLASS_MEMBER_METHOD(GetRootCategory, NO_PARAMETER);
 				CLASS_MEMBER_METHOD(GetSelectedCategory, NO_PARAMETER);
 				CLASS_MEMBER_METHOD(SetSelectedCategory, { L"value" });
 				CLASS_MEMBER_EVENT(SelectedCategoryChanged)
+				CLASS_MEMBER_METHOD(GetSelectedContact, NO_PARAMETER);
+				CLASS_MEMBER_METHOD(SetSelectedContact, { L"value" });
+				CLASS_MEMBER_EVENT(SelectedContactChanged)
 				CLASS_MEMBER_METHOD(AddCategory, { L"name" });
 				CLASS_MEMBER_METHOD(RemoveCategory, NO_PARAMETER);
+				CLASS_MEMBER_METHOD(CreateContact, NO_PARAMETER);
+				CLASS_MEMBER_METHOD(AddContact, { L"contact" });
+				CLASS_MEMBER_METHOD(RemoveContact, NO_PARAMETER);
 				CLASS_MEMBER_PROPERTY_EVENT(SelectedCategory, GetSelectedCategory, SetSelectedCategory, SelectedCategoryChanged)
+				CLASS_MEMBER_PROPERTY_EVENT(SelectedContact, GetSelectedContact, SetSelectedContact, SelectedContactChanged)
 			END_CLASS_MEMBER(demo::IViewModel)
 
 			BEGIN_CLASS_MEMBER(demo::MainWindow)
@@ -80,11 +105,9 @@ namespace vl
 				CLASS_MEMBER_CONSTRUCTOR(demo::MainWindow*(Ptr<demo::IViewModel>), { L"ViewModel" })
 
 				CLASS_MEMBER_GUIEVENT_HANDLER(commandBigIcon_Executed, vl::presentation::compositions::GuiEventArgs)
-				CLASS_MEMBER_GUIEVENT_HANDLER(commandDeleteContact_Executed, vl::presentation::compositions::GuiEventArgs)
 				CLASS_MEMBER_GUIEVENT_HANDLER(commandDetail_Executed, vl::presentation::compositions::GuiEventArgs)
 				CLASS_MEMBER_GUIEVENT_HANDLER(commandInformation_Executed, vl::presentation::compositions::GuiEventArgs)
 				CLASS_MEMBER_GUIEVENT_HANDLER(commandList_Executed, vl::presentation::compositions::GuiEventArgs)
-				CLASS_MEMBER_GUIEVENT_HANDLER(commandNewContact_Executed, vl::presentation::compositions::GuiEventArgs)
 				CLASS_MEMBER_GUIEVENT_HANDLER(commandSmallIcon_Executed, vl::presentation::compositions::GuiEventArgs)
 				CLASS_MEMBER_GUIEVENT_HANDLER(commandTile_Executed, vl::presentation::compositions::GuiEventArgs)
 
@@ -109,6 +132,7 @@ namespace vl
 				void Load(ITypeManager* manager)
 				{
 					ADD_TYPE_INFO(demo::ICategory)
+					ADD_TYPE_INFO(demo::IContact)
 					ADD_TYPE_INFO(demo::IViewModel)
 					ADD_TYPE_INFO(demo::MainWindow)
 					ADD_TYPE_INFO(demo::NewFolderWindow)
diff --git a/Tutorial/GacUI_Controls/AddressBook/UI/Source/DemoPartialClasses.h b/Tutorial/GacUI_Controls/AddressBook/UI/Source/DemoPartialClasses.h
index dd9196bd..6d548dd1 100644
--- a/Tutorial/GacUI_Controls/AddressBook/UI/Source/DemoPartialClasses.h
+++ b/Tutorial/GacUI_Controls/AddressBook/UI/Source/DemoPartialClasses.h
@@ -15,11 +15,24 @@ DO NOT MODIFY
 
 namespace demo
 {
+	class IContact;
 	class ICategory;
 	class IViewModel;
 	class MainWindow;
 	class NewFolderWindow;
 
+	class IContact : public virtual vl::reflection::IDescriptable, public vl::reflection::Description<IContact>
+	{
+	public:
+		virtual vl::WString GetName() = 0;
+		virtual vl::Ptr<vl::presentation::GuiImageData> GetBigImage() = 0;
+		virtual vl::Ptr<vl::presentation::GuiImageData> GetSmallImage() = 0;
+		virtual vl::DateTime GetBirthday() = 0;
+		virtual vl::WString GetPhone() = 0;
+		virtual vl::WString GetAddress() = 0;
+		virtual void Update(vl::WString name, vl::DateTime birthday, vl::WString phone, vl::WString address) = 0;
+	};
+
 	class ICategory : public virtual vl::reflection::IDescriptable, public vl::reflection::Description<ICategory>
 	{
 	public:
@@ -37,8 +50,14 @@ namespace demo
 		virtual vl::Ptr<demo::ICategory> GetSelectedCategory() = 0;
 		virtual void SetSelectedCategory(vl::Ptr<demo::ICategory> value) = 0;
 		vl::Event<void()> SelectedCategoryChanged;
+		virtual vl::Ptr<demo::IContact> GetSelectedContact() = 0;
+		virtual void SetSelectedContact(vl::Ptr<demo::IContact> value) = 0;
+		vl::Event<void()> SelectedContactChanged;
 		virtual void AddCategory(vl::WString name) = 0;
 		virtual void RemoveCategory() = 0;
+		virtual vl::Ptr<demo::IContact> CreateContact() = 0;
+		virtual void AddContact(vl::Ptr<demo::IContact> contact) = 0;
+		virtual void RemoveContact() = 0;
 	};
 
 	template<typename TImpl>
@@ -180,6 +199,7 @@ namespace vl
 		namespace description
 		{
 			DECL_TYPE_INFO(demo::ICategory)
+			DECL_TYPE_INFO(demo::IContact)
 			DECL_TYPE_INFO(demo::IViewModel)
 			DECL_TYPE_INFO(demo::MainWindow)
 			DECL_TYPE_INFO(demo::NewFolderWindow)
diff --git a/Tutorial/GacUI_Controls/AddressBook/UI/Source/MainWindow.cpp b/Tutorial/GacUI_Controls/AddressBook/UI/Source/MainWindow.cpp
index 67fd0f5e..53841df0 100644
--- a/Tutorial/GacUI_Controls/AddressBook/UI/Source/MainWindow.cpp
+++ b/Tutorial/GacUI_Controls/AddressBook/UI/Source/MainWindow.cpp
@@ -16,10 +16,6 @@ namespace demo
 	{
 	}
 
-	void MainWindow::commandDeleteContact_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments)
-	{
-	}
-
 	void MainWindow::commandDetail_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments)
 	{
 	}
@@ -32,10 +28,6 @@ namespace demo
 	{
 	}
 
-	void MainWindow::commandNewContact_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments)
-	{
-	}
-
 	void MainWindow::commandSmallIcon_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments)
 	{
 	}
diff --git a/Tutorial/GacUI_Controls/AddressBook/UI/Source/MainWindow.h b/Tutorial/GacUI_Controls/AddressBook/UI/Source/MainWindow.h
index 86742185..bfc91ab3 100644
--- a/Tutorial/GacUI_Controls/AddressBook/UI/Source/MainWindow.h
+++ b/Tutorial/GacUI_Controls/AddressBook/UI/Source/MainWindow.h
@@ -21,11 +21,9 @@ namespace demo
 
 		// #region CLASS_MEMBER_GUIEVENT_HANDLER (DO NOT PUT OTHER CONTENT IN THIS #region.)
 		void commandBigIcon_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments);
-		void commandDeleteContact_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments);
 		void commandDetail_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments);
 		void commandInformation_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments);
 		void commandList_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments);
-		void commandNewContact_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments);
 		void commandSmallIcon_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments);
 		void commandTile_Executed(GuiGraphicsComposition* sender, vl::presentation::compositions::GuiEventArgs& arguments);
 		void OnCreate();
diff --git a/Tutorial/GacUI_Controls/UIRes/AddressBook.bin b/Tutorial/GacUI_Controls/UIRes/AddressBook.bin
index 5f863679..356c4168 100644
Binary files a/Tutorial/GacUI_Controls/UIRes/AddressBook.bin and b/Tutorial/GacUI_Controls/UIRes/AddressBook.bin differ