added basic xml comments to all Oqtane.Services interfaces

Oqtane.Client/Services/Interfaces/INotificationService.cs

@@ -1,19 +1,49 @@
-using Oqtane.Models;
+using Oqtane.Models;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace Oqtane.Services
-{
+{ 
+    /// <summary>
+    /// Service to store and retreive notifications (<see cref="Notification"/>)
+    /// </summary>
     public interface INotificationService
     {
+        /// <summary>
+        /// Return a list of notifications
+        /// </summary>
+        /// <param name="siteId"></param>
+        /// <param name="direction"></param>
+        /// <param name="userId"></param>
+        /// <returns></returns>
         Task<List<Notification>> GetNotificationsAsync(int siteId, string direction, int userId);
 
+        /// <summary>
+        /// Returns a specific notifications
+        /// </summary>
+        /// <param name="notificationId"></param>
+        /// <returns></returns>
         Task<Notification> GetNotificationAsync(int notificationId);
 
+        /// <summary>
+        /// Creates a new notification
+        /// </summary>
+        /// <param name="notification"></param>
+        /// <returns></returns>
         Task<Notification> AddNotificationAsync(Notification notification);
 
+        /// <summary>
+        /// Updates a existing notification
+        /// </summary>
+        /// <param name="notification"></param>
+        /// <returns></returns>
         Task<Notification> UpdateNotificationAsync(Notification notification);
 
+        /// <summary>
+        /// Deletes a notification
+        /// </summary>
+        /// <param name="notificationId"></param>
+        /// <returns></returns>
         Task DeleteNotificationAsync(int notificationId);
     }
 }