actually implement the thing

Octokit.Reactive/Clients/ObservableUserKeysClient.cs

@@ -4,6 +4,12 @@ using System.Reactive.Threading.Tasks;
 
 namespace Octokit.Reactive
 {
+    /// <summary>
+    /// A client for GitHub's User Keys API.
+    /// </summary>
+    /// <remarks>
+    /// See the <a href="http://developer.github.com/v3/users/keys/">User Keys API documentation</a> for more information.
+    /// </remarks>
     public class ObservableUserKeysClient : IObservableUserKeysClient
     {
         readonly IUserKeysClient _client;
@@ -15,11 +21,25 @@ namespace Octokit.Reactive
             _client = client.User.Keys;
         }
 
+        /// <summary>
+        /// Gets all public keys for the authenticated user.
+        /// </summary>
+        /// <remarks>
+        /// https://developer.github.com/v3/users/keys/#list-your-public-keys
+        /// </remarks>
+        /// <returns>The <see cref="PublicKey"/>s for the authenticated user.</returns>
         public IObservable<PublicKey> GetAll()
         {
             return _client.GetAll().ToObservable().SelectMany(k => k);
         }
 
+        /// <summary>
+        /// Gets all verified public keys for a user.
+        /// </summary>
+        /// <remarks>
+        /// https://developer.github.com/v3/users/keys/#list-public-keys-for-a-user
+        /// </remarks>
+        /// <returns>The <see cref="PublicKey"/>s for the user.</returns>
         public IObservable<PublicKey> GetAll(string userName)
         {
             return _client.GetAll(userName).ToObservable().SelectMany(k => k);