diff --git a/Octokit.Tests/Clients/TagsClientTests.cs b/Octokit.Tests/Clients/TagsClientTests.cs
index 7d693d36..acd13242 100644
--- a/Octokit.Tests/Clients/TagsClientTests.cs
+++ b/Octokit.Tests/Clients/TagsClientTests.cs
@@ -83,12 +83,7 @@ public class TagsClientTests
                 Tag = "tag-name",
                 Object = "tag-object",
                 Type = TaggedType.Tree,
-                Tagger = new SignatureResponse
-                {
-                    Name = "tagger-name",
-                    Email = "tagger-email",
-                    Date = DateTimeOffset.Parse("2013-09-03T13:42:52Z")
-                }
+                Tagger = new SignatureResponse("tagger-name", "tagger-email", DateTimeOffset.Parse("2013-09-03T13:42:52Z"))
             };
 
             var json = new SimpleJsonSerializer().Serialize(tag);
diff --git a/Octokit/Models/Response/FeedLink.cs b/Octokit/Models/Response/FeedLink.cs
index bb1668fb..87183fd7 100644
--- a/Octokit/Models/Response/FeedLink.cs
+++ b/Octokit/Models/Response/FeedLink.cs
@@ -11,32 +11,32 @@ namespace Octokit
         /// <summary>
         /// The GitHub global public timeline
         /// </summary>
-        public FeedLink Timeline { get; set; }
+        public FeedLink Timeline { get; protected set; }
 
         /// <summary>
         /// The public timeline for any user, using URI template
         /// </summary>
-        public FeedLink User { get; set; }
+        public FeedLink User { get; protected set; }
 
         /// <summary>
         /// The public timeline for the authenticated user
         /// </summary>
-        public FeedLink CurrentUserPublic { get; set; }
+        public FeedLink CurrentUserPublic { get; protected set; }
 
         /// <summary>
         /// The private timeline for the authenticated user
         /// </summary>
-        public FeedLink CurrentUser { get; set; }
+        public FeedLink CurrentUser { get; protected set; }
 
         /// <summary>
         /// The private timeline for activity created by the authenticated user
         /// </summary>
-        public FeedLink CurrentUserActor { get; set; }
+        public FeedLink CurrentUserActor { get; protected set; }
 
         /// <summary>
         /// The private timeline for the authenticated user for a given organization, using URI template
         /// </summary>  
-        public FeedLink CurrentUserOrganization { get; set; }
+        public FeedLink CurrentUserOrganization { get; protected set; }
     }
 
     /// <summary>
@@ -47,12 +47,12 @@ namespace Octokit
         /// <summary>
         /// Link to feed
         /// </summary>
-        public string Href { get; set; }
+        public string Href { get; protected set; }
 
         /// <summary>
         /// Feed type, e.g. application/atom+xml
         /// </summary>
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1721:PropertyNamesShouldNotMatchGetMethods")]
-        public string Type { get; set; }
+        public string Type { get; protected set; }
     }
 }
\ No newline at end of file
diff --git a/Octokit/Models/Response/GitHubCommitStats.cs b/Octokit/Models/Response/GitHubCommitStats.cs
index 940d3550..91caca3d 100644
--- a/Octokit/Models/Response/GitHubCommitStats.cs
+++ b/Octokit/Models/Response/GitHubCommitStats.cs
@@ -13,24 +13,21 @@ namespace Octokit
         /// <summary>
         /// The number of additions made within the commit
         /// </summary>
-        public int Additions { get; set; }
+        public int Additions { get; protected set; }
 
         /// <summary>
         /// The number of deletions made within the commit
         /// </summary>
-        public int Deletions { get; set; }
+        public int Deletions { get; protected set; }
 
         /// <summary>
         /// The total number of modifications within the commit
         /// </summary>
-        public int Total { get; set; }
+        public int Total { get; protected set; }
 
         internal string DebuggerDisplay
         {
-            get
-            {
-                return String.Format(CultureInfo.InvariantCulture, "Stats: +{0} -{1} ={2}", Additions, Deletions, Total);
-            }
+            get { return String.Format(CultureInfo.InvariantCulture, "Stats: +{0} -{1} ={2}", Additions, Deletions, Total); }
         }
     }
 }
diff --git a/Octokit/Models/Response/NotificationInfo.cs b/Octokit/Models/Response/NotificationInfo.cs
index db1670cc..65ea31a8 100644
--- a/Octokit/Models/Response/NotificationInfo.cs
+++ b/Octokit/Models/Response/NotificationInfo.cs
@@ -4,11 +4,14 @@ namespace Octokit
 {
     public class NotificationInfo
     {
-        public string Title { get; set; }
-        public string Url { get; set; }
-        public string LatestCommentUrl { get; set; }
+        public string Title { get; protected set; }
+
+        public string Url { get; protected set; }
+
+        public string LatestCommentUrl { get; protected set; }
+
         [SuppressMessage("Microsoft.Naming", "CA1721:PropertyNamesShouldNotMatchGetMethods",
             Justification = "Matches the property name used by the API")]
-        public string Type { get; set; }
+        public string Type { get; protected set; }
     }
 }
diff --git a/Octokit/Models/Response/Plan.cs b/Octokit/Models/Response/Plan.cs
index a7740656..6d285a30 100644
--- a/Octokit/Models/Response/Plan.cs
+++ b/Octokit/Models/Response/Plan.cs
@@ -9,28 +9,28 @@ namespace Octokit
         /// The number of collaborators allowed with this plan.
         /// </summary>
         /// <remarks>This returns <see cref="long"/> because GitHub Enterprise uses a sentinel value of 999999999999 to denote an "unlimited" number of collaborators.</remarks>
-        public long Collaborators { get; set; }
+        public long Collaborators { get; protected set; }
 
         /// <summary>
         /// The name of the plan.
         /// </summary>
-        public string Name { get; set; }
+        public string Name { get; protected set; }
 
         /// <summary>
         /// The number of private repositories allowed with this plan.
         /// </summary>
         /// <remarks>This returns <see cref="long"/> because GitHub Enterprise uses a sentinel value of 999999999999 to denote an "unlimited" number of plans.</remarks>
-        public long PrivateRepos { get; set; }
+        public long PrivateRepos { get; protected set; }
 
         /// <summary>
         /// The amount of disk space allowed with this plan.
         /// </summary>
         /// <remarks>This returns <see cref="long"/> because GitHub Enterprise uses a sentinel value of 999999999999 to denote an "unlimited" amount of disk space.</remarks>
-        public long Space { get; set; }
+        public long Space { get; protected set; }
 
         /// <summary>
         /// The billing email for the organization. Only has a value in response to editing an organization.
         /// </summary>
-        public string BillingEmail { get; set; }
+        public string BillingEmail { get; protected set; }
     }
 }
\ No newline at end of file
diff --git a/Octokit/Models/Response/RepositoryPermissions.cs b/Octokit/Models/Response/RepositoryPermissions.cs
index 1997dffb..62c3c413 100644
--- a/Octokit/Models/Response/RepositoryPermissions.cs
+++ b/Octokit/Models/Response/RepositoryPermissions.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Diagnostics;
-using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 
 namespace Octokit
@@ -11,25 +10,21 @@ namespace Octokit
         /// <summary>
         /// Whether the current user has administrative permissions
         /// </summary>
-        public bool Admin { get; set; }
+        public bool Admin { get; protected set; }
 
         /// <summary>
         /// Whether the current user has push permissions
         /// </summary>
-        public bool Push { get; set; }
+        public bool Push { get; protected set; }
 
         /// <summary>
         /// Whether the current user has pull permissions
         /// </summary>
-        public bool Pull { get; set; }
-
+        public bool Pull { get; protected set; }
 
         internal string DebuggerDisplay
         {
-            get
-            {
-                return String.Format(CultureInfo.InvariantCulture, "Admin: {0}, Push: {1}, Pull: {2}", Admin, Push, Pull);
-            }
+            get { return String.Format(CultureInfo.InvariantCulture, "Admin: {0}, Push: {1}, Pull: {2}", Admin, Push, Pull); }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Octokit/Models/Response/SignatureResponse.cs b/Octokit/Models/Response/SignatureResponse.cs
index 517d5b3b..854cc2e0 100644
--- a/Octokit/Models/Response/SignatureResponse.cs
+++ b/Octokit/Models/Response/SignatureResponse.cs
@@ -7,16 +7,26 @@ namespace Octokit
     [DebuggerDisplay("{DebuggerDisplay,nq}")]
     public class SignatureResponse
     {
-        public string Name { get; set; }
-        public string Email { get; set; }
-        public DateTimeOffset Date { get; set; }
+        public SignatureResponse()
+        {
+        }
+
+        public SignatureResponse(string name, string email, DateTimeOffset date)
+        {
+            Name = name;
+            Email = email;
+            Date = date;
+        }
+
+        public string Name { get; protected set; }
+
+        public string Email { get; protected set; }
+
+        public DateTimeOffset Date { get; protected set; }
 
         internal string DebuggerDisplay
         {
-            get
-            {
-                return String.Format(CultureInfo.InvariantCulture, "Name: {0} Email: {1} Date: {2}", Name, Email, Date);
-            }
+            get { return String.Format(CultureInfo.InvariantCulture, "Name: {0} Email: {1} Date: {2}", Name, Email, Date); }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Octokit/Models/Response/TagObject.cs b/Octokit/Models/Response/TagObject.cs
index 183f754f..85652276 100644
--- a/Octokit/Models/Response/TagObject.cs
+++ b/Octokit/Models/Response/TagObject.cs
@@ -4,7 +4,7 @@
     {
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1721:PropertyNamesShouldNotMatchGetMethods", 
             Justification = "Name defined by web api and required for deserialisation")]
-        public TaggedType Type { get; set; }
+        public TaggedType Type { get; protected set; }
     }
 
     /// <summary>