diff --git a/src/Microsoft.AspNet.Hosting.Abstractions/EnvironmentName.cs b/src/Microsoft.AspNet.Hosting.Abstractions/EnvironmentName.cs
index ec2533be13..6ab7b945c1 100644
--- a/src/Microsoft.AspNet.Hosting.Abstractions/EnvironmentName.cs
+++ b/src/Microsoft.AspNet.Hosting.Abstractions/EnvironmentName.cs
@@ -3,6 +3,9 @@
 
 namespace Microsoft.AspNet.Hosting
 {
+    /// <summary>
+    /// Commonly used environment names.
+    /// </summary>
     public static class EnvironmentName
     {
         public static readonly string Development = "Development";
diff --git a/src/Microsoft.AspNet.Hosting.Abstractions/HostingEnvironmentExtensions.cs b/src/Microsoft.AspNet.Hosting.Abstractions/HostingEnvironmentExtensions.cs
index ca638841b2..c8bc3993a7 100644
--- a/src/Microsoft.AspNet.Hosting.Abstractions/HostingEnvironmentExtensions.cs
+++ b/src/Microsoft.AspNet.Hosting.Abstractions/HostingEnvironmentExtensions.cs
@@ -6,6 +6,9 @@ using System.IO;
 
 namespace Microsoft.AspNet.Hosting
 {
+    /// <summary>
+    /// Extension methods for <see cref="IHostingEnvironment"/>.
+    /// </summary>
     public static class HostingEnvironmentExtensions
     {
         /// <summary>