diff --git a/Octokit/Models/Request/MarkAsReadRequest.cs b/Octokit/Models/Request/MarkAsReadRequest.cs
index cedf4808..e62074cb 100644
--- a/Octokit/Models/Request/MarkAsReadRequest.cs
+++ b/Octokit/Models/Request/MarkAsReadRequest.cs
@@ -1,6 +1,6 @@
 using System;
 using System.Diagnostics;
-using Octokit.Internal;
+using System.Globalization;
 
 namespace Octokit
 {
@@ -16,5 +16,10 @@ namespace Octokit
         /// Describes the last point that notifications were checked. Anything updated since this time will not be updated.
         /// </summary>
         public DateTimeOffset? LastReadAt { get; set; }
+
+        internal string DebuggerDisplay
+        {
+            get { return String.Format(CultureInfo.InvariantCulture, "LastReadAt: {0}", LastReadAt); }
+        }
     }
 }
diff --git a/Octokit/Models/Request/NewDeployKey.cs b/Octokit/Models/Request/NewDeployKey.cs
index f48c1683..44571159 100644
--- a/Octokit/Models/Request/NewDeployKey.cs
+++ b/Octokit/Models/Request/NewDeployKey.cs
@@ -1,9 +1,6 @@
 using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.Globalization;
 
 namespace Octokit
 {
@@ -14,6 +11,12 @@ namespace Octokit
     public class NewDeployKey
     {
         public string Title { get; set; }
+
         public string Key { get; set; }
+
+        internal string DebuggerDisplay
+        {
+            get { return String.Format(CultureInfo.InvariantCulture, "Key: {0}, Title: {1}", Key, Title); }
+        }
     }
 }
diff --git a/Octokit/Models/Request/PullRequestReviewCommentCreate.cs b/Octokit/Models/Request/PullRequestReviewCommentCreate.cs
index d9ae04b8..54bc8050 100644
--- a/Octokit/Models/Request/PullRequestReviewCommentCreate.cs
+++ b/Octokit/Models/Request/PullRequestReviewCommentCreate.cs
@@ -1,5 +1,6 @@
-using System.Diagnostics;
-using Octokit.Internal;
+using System;
+using System.Diagnostics;
+using System.Globalization;
 
 namespace Octokit
 {
@@ -44,5 +45,10 @@ namespace Octokit
         /// The line index in the diff to comment on.
         /// </summary>
         public int Position { get; private set; }
+
+        internal string DebuggerDisplay
+        {
+            get { return String.Format(CultureInfo.InvariantCulture, "CommitId: {0}, Path: {1}, Position: {2}", CommitId, Path, Position); }
+        }
     }
 }
diff --git a/Octokit/Models/Request/PullRequestReviewCommentEdit.cs b/Octokit/Models/Request/PullRequestReviewCommentEdit.cs
index f8cc7ba1..527f4593 100644
--- a/Octokit/Models/Request/PullRequestReviewCommentEdit.cs
+++ b/Octokit/Models/Request/PullRequestReviewCommentEdit.cs
@@ -1,4 +1,6 @@
-using System.Diagnostics;
+using System;
+using System.Diagnostics;
+using System.Globalization;
 
 namespace Octokit
 {
@@ -20,5 +22,10 @@ namespace Octokit
         /// The text of the comment.
         /// </summary>
         public string Body { get; private set; }
+
+        internal string DebuggerDisplay
+        {
+            get { return String.Format(CultureInfo.InvariantCulture, "Body: {0}", Body); }
+        }
     }
 }
diff --git a/Octokit/Models/Request/PullRequestReviewCommentReplyCreate.cs b/Octokit/Models/Request/PullRequestReviewCommentReplyCreate.cs
index 221ea677..8a17544b 100644
--- a/Octokit/Models/Request/PullRequestReviewCommentReplyCreate.cs
+++ b/Octokit/Models/Request/PullRequestReviewCommentReplyCreate.cs
@@ -1,5 +1,6 @@
-using System.Diagnostics;
-using Octokit.Internal;
+using System;
+using System.Diagnostics;
+using System.Globalization;
 
 namespace Octokit
 {
@@ -28,5 +29,10 @@ namespace Octokit
         /// The comment Id to reply to.
         /// </summary>
         public int InReplyTo { get; private set; }
+
+        internal string DebuggerDisplay
+        {
+            get { return String.Format(CultureInfo.InvariantCulture, "InReplyTo: {0}, Body: {1}", InReplyTo, Body); }
+        }
     }
 }
diff --git a/Octokit/Models/Request/PullRequestReviewCommentRequest.cs b/Octokit/Models/Request/PullRequestReviewCommentRequest.cs
index 4bd22d0f..5d923854 100644
--- a/Octokit/Models/Request/PullRequestReviewCommentRequest.cs
+++ b/Octokit/Models/Request/PullRequestReviewCommentRequest.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.Globalization;
 
 namespace Octokit
 {
@@ -28,5 +29,10 @@ namespace Octokit
         /// Only comments updated at or after this time are returned. This is a timestamp in ISO 8601 format: YYYY-MM-DDTHH:MM:SSZ.
         /// </summary>
         public DateTimeOffset? Since { get; set; }
+
+        internal string DebuggerDisplay
+        {
+            get { return String.Format(CultureInfo.InvariantCulture, "Sort: {0}, Direction: {1}, Since: {2}", Sort, Direction, Since); }
+        }
     }
 }
diff --git a/Octokit/Models/Request/RequestParameters.cs b/Octokit/Models/Request/RequestParameters.cs
index 2cf5f06f..b6857e75 100644
--- a/Octokit/Models/Request/RequestParameters.cs
+++ b/Octokit/Models/Request/RequestParameters.cs
@@ -3,7 +3,6 @@
 using System.Collections.Concurrent;
 #endif
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.Linq;
@@ -15,7 +14,6 @@ namespace Octokit
     /// <summary>
     /// Base class for classes which represent query string parameters to certain API endpoints.
     /// </summary>
-    [DebuggerDisplay("{DebuggerDisplay,nq}")]
     public abstract class RequestParameters
     {
 #if PORTABLE
diff --git a/Octokit/Models/Response/PullRequestReviewComment.cs b/Octokit/Models/Response/PullRequestReviewComment.cs
index 4db57671..462888c0 100644
--- a/Octokit/Models/Response/PullRequestReviewComment.cs
+++ b/Octokit/Models/Response/PullRequestReviewComment.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.Globalization;
 
 namespace Octokit
 {
@@ -84,6 +85,11 @@ namespace Octokit
         /// The URL for the pull request via the API.
         /// </summary>
         public Uri PullRequestUrl { get; protected set; }
+
+        internal string DebuggerDisplay
+        {
+            get { return String.Format(CultureInfo.InvariantCulture, "Id: {0}, Path: {1}, User: {2}, Url: {3}", Id, Path, User.DebuggerDisplay, Url); }
+        }
     }
 
     public enum PullRequestReviewCommentSort