diff --git a/src/Microsoft.AspNet.Session/SessionMiddleware.cs b/src/Microsoft.AspNet.Session/SessionMiddleware.cs
index 2735aa0126..dffbe01b76 100644
--- a/src/Microsoft.AspNet.Session/SessionMiddleware.cs
+++ b/src/Microsoft.AspNet.Session/SessionMiddleware.cs
@@ -15,6 +15,9 @@ using Microsoft.Framework.OptionsModel;
 
 namespace Microsoft.AspNet.Session
 {
+    /// <summary>
+    /// Enables the session state for the application.
+    /// </summary>
     public class SessionMiddleware
     {
         private static readonly RandomNumberGenerator CryptoRandom = RandomNumberGenerator.Create();
@@ -25,6 +28,13 @@ namespace Microsoft.AspNet.Session
         private readonly ILogger _logger;
         private readonly ISessionStore _sessionStore;
 
+        /// <summary>
+        /// Creates a new <see cref="SessionMiddleware"/>.
+        /// </summary>
+        /// <param name="next">The <see cref="RequestDelegate"/> representing the next middleware in the pipeline.</param>
+        /// <param name="loggerFactory">The <see cref="ILoggerFactory"/> representing the factory that used to create logger instances.</param>
+        /// <param name="sessionStore">The <see cref="ISessionStore"/> representing the session store.</param>
+        /// <param name="options">The session configuration options.</param>
         public SessionMiddleware(
             [NotNull] RequestDelegate next,
             [NotNull] ILoggerFactory loggerFactory,
@@ -38,6 +48,11 @@ namespace Microsoft.AspNet.Session
             _sessionStore.Connect();
         }
 
+        /// <summary>
+        /// Invokes the logic of the middleware.
+        /// </summary>
+        /// <param name="context">The <see cref="HttpContext"/>.</param>
+        /// <returns>A <see cref="Task"/> that completes when the middleware has completed processing.</returns>
         public async Task Invoke(HttpContext context)
         {
             var isNewSessionKey = false;
diff --git a/src/Microsoft.AspNet.Session/SessionMiddlewareExtensions.cs b/src/Microsoft.AspNet.Session/SessionMiddlewareExtensions.cs
index 89273bc2fc..d4a2e322f9 100644
--- a/src/Microsoft.AspNet.Session/SessionMiddlewareExtensions.cs
+++ b/src/Microsoft.AspNet.Session/SessionMiddlewareExtensions.cs
@@ -6,8 +6,16 @@ using Microsoft.Framework.Internal;
 
 namespace Microsoft.AspNet.Builder
 {
+    /// <summary>
+    /// Extension methods for adding the <see cref="SessionMiddleware"/> to an application.
+    /// </summary>
     public static class SessionMiddlewareExtensions
     {
+        /// <summary>
+        /// Adds the <see cref="SessionMiddleware"/> to automatically enable session state for the application.
+        /// </summary>
+        /// <param name="app">The <see cref="IApplicationBuilder"/>.</param>
+        /// <returns>The <see cref="IApplicationBuilder"/>.</returns>
         public static IApplicationBuilder UseSession([NotNull] this IApplicationBuilder app)
         {
             return app.UseMiddleware<SessionMiddleware>();
diff --git a/src/Microsoft.AspNet.Session/SessionServiceCollectionExtensions.cs b/src/Microsoft.AspNet.Session/SessionServiceCollectionExtensions.cs
index 2fd488820d..04f73dbd41 100644
--- a/src/Microsoft.AspNet.Session/SessionServiceCollectionExtensions.cs
+++ b/src/Microsoft.AspNet.Session/SessionServiceCollectionExtensions.cs
@@ -7,8 +7,16 @@ using Microsoft.Framework.Internal;
 
 namespace Microsoft.Framework.DependencyInjection
 {
+    /// <summary>
+    /// Extension methods for adding session services to the DI container.
+    /// </summary>
     public static class SessionServiceCollectionExtensions
     {
+        /// <summary>
+        /// Adds services required for application session state.
+        /// </summary>
+        /// <param name="services">The <see cref="IServiceCollection"/> to add the services to.</param>
+        /// <returns>The <see cref="IServiceCollection"/>.</returns>
         public static IServiceCollection AddSession([NotNull] this IServiceCollection services)
         {
             services.AddOptions();
@@ -16,6 +24,11 @@ namespace Microsoft.Framework.DependencyInjection
             return services;
         }
 
+        /// <summary>
+        /// Configures the session.
+        /// </summary>
+        /// <param name="services">The <see cref="IServiceCollection"/> to configure the services.</param>
+        /// <param name="configure">The session options to configure the middleware with.</param>
         public static void ConfigureSession(
             [NotNull] this IServiceCollection services,
             [NotNull] Action<SessionOptions> configure)