diff --git a/src/Orchard.Core.Tests/Body/BodyPartTests.cs b/src/Orchard.Core.Tests/Body/BodyPartTests.cs
index c847407bb..b0d128b65 100644
--- a/src/Orchard.Core.Tests/Body/BodyPartTests.cs
+++ b/src/Orchard.Core.Tests/Body/BodyPartTests.cs
@@ -86,8 +86,6 @@ namespace Orchard.Core.Tests.Body {
         }
 
         public class Thing : ContentPart {
-            public int Id { get { return ContentItem.Id; } }
-
             public string Text {
                 get { return this.As<BodyPart>().Text; }
                 set { this.As<BodyPart>().Text = value; }
diff --git a/src/Orchard.Core.Tests/Routable/Services/RoutableServiceTests.cs b/src/Orchard.Core.Tests/Routable/Services/RoutableServiceTests.cs
index 848b89ab9..0ec9e4762 100644
--- a/src/Orchard.Core.Tests/Routable/Services/RoutableServiceTests.cs
+++ b/src/Orchard.Core.Tests/Routable/Services/RoutableServiceTests.cs
@@ -208,8 +208,6 @@ namespace Orchard.Core.Tests.Routable.Services {
         }
 
         public class Thing : ContentPart {
-            public int Id { get { return ContentItem.Id; } }
-
             public string Title {
                 get { return this.As<RoutePart>().Title; }
                 set { this.As<RoutePart>().Title = value; }
@@ -232,8 +230,6 @@ namespace Orchard.Core.Tests.Routable.Services {
         }
 
         public class Stuff : ContentPart {
-            public int Id { get { return ContentItem.Id; } }
-
             public string Title {
                 get { return this.As<RoutePart>().Title; }
                 set { this.As<RoutePart>().Title = value; }
diff --git a/src/Orchard.Web/Core/Localization/Models/LocalizationPart.cs b/src/Orchard.Web/Core/Localization/Models/LocalizationPart.cs
index de5ab9a85..b376ea0d9 100644
--- a/src/Orchard.Web/Core/Localization/Models/LocalizationPart.cs
+++ b/src/Orchard.Web/Core/Localization/Models/LocalizationPart.cs
@@ -11,9 +11,6 @@ namespace Orchard.Core.Localization.Models {
         public LazyField<CultureRecord> CultureField { get { return _culture; } }
         public LazyField<IContent> MasterContentItemField { get { return _masterContentItem; } }
 
-        [HiddenInput(DisplayValue = false)]
-        public int Id { get { return ContentItem.Id; } }
-
         public CultureRecord Culture {
             get { return _culture.Value; }
             set { _culture.Value = value; }
diff --git a/src/Orchard.Web/Core/Navigation/Models/MenuItemPart.cs b/src/Orchard.Web/Core/Navigation/Models/MenuItemPart.cs
index ad97500f7..6e9e0fb56 100644
--- a/src/Orchard.Web/Core/Navigation/Models/MenuItemPart.cs
+++ b/src/Orchard.Web/Core/Navigation/Models/MenuItemPart.cs
@@ -4,9 +4,6 @@ using Orchard.ContentManagement;
 
 namespace Orchard.Core.Navigation.Models {
     public class MenuItemPart : ContentPart<MenuItemPartRecord> {
-        [HiddenInput(DisplayValue = false)]
-        public int Id { get { return ContentItem.Id; } }
-
         [Required]
         public string Url {
             get { return Record.Url; }
diff --git a/src/Orchard.Web/Core/Navigation/Models/MenuPart.cs b/src/Orchard.Web/Core/Navigation/Models/MenuPart.cs
index 21fdbf7ec..70e6a43fb 100644
--- a/src/Orchard.Web/Core/Navigation/Models/MenuPart.cs
+++ b/src/Orchard.Web/Core/Navigation/Models/MenuPart.cs
@@ -4,8 +4,6 @@ using Orchard.ContentManagement;
 
 namespace Orchard.Core.Navigation.Models {
     public class MenuPart : ContentPart<MenuPartRecord> {
-        [HiddenInput(DisplayValue = false)]
-        public int Id { get { return ContentItem.Id; } }
 
         public bool OnMainMenu {
             get { return Record.OnMainMenu; }
diff --git a/src/Orchard.Web/Modules/Orchard.Blogs/Models/BlogPart.cs b/src/Orchard.Web/Modules/Orchard.Blogs/Models/BlogPart.cs
index 484f8ba8a..09bffdedc 100644
--- a/src/Orchard.Web/Modules/Orchard.Blogs/Models/BlogPart.cs
+++ b/src/Orchard.Web/Modules/Orchard.Blogs/Models/BlogPart.cs
@@ -4,9 +4,6 @@ using Orchard.Core.Routable.Models;
 
 namespace Orchard.Blogs.Models {
     public class BlogPart : ContentPart<BlogPartRecord> {
-        [HiddenInput(DisplayValue = false)]
-        public int Id { get { return ContentItem.Id; } }
-
         public string Name {
             get { return this.As<RoutePart>().Title; }
             set { this.As<RoutePart>().Title = value; }
diff --git a/src/Orchard/Security/IUser.cs b/src/Orchard/Security/IUser.cs
index c955f3593..a68f1b215 100644
--- a/src/Orchard/Security/IUser.cs
+++ b/src/Orchard/Security/IUser.cs
@@ -5,7 +5,6 @@ namespace Orchard.Security {
     /// Interface provided by the "User" model. 
     /// </summary>
     public interface IUser : IContent {
-        int Id { get; }
         string UserName { get; }
         string Email { get; }
     }