extending heartbeat response

AgentInterfaces/MaintenanceSchedule.cs

@@ -7,8 +7,10 @@ namespace Microsoft.Azure.Gaming.AgentInterfaces
     using System.Collections.Generic;
     using System.Linq;
     using Newtonsoft.Json;
+    using Newtonsoft.Json.Converters;
 
-    // Data Format: https://docs.microsoft.com/en-us/azure/virtual-machines/virtual-machines-scheduled-events
+    // Data Format: https://docs.microsoft.com/en-us/azure/virtual-machines/windows/scheduled-events
+    [Serializable]
     public class MaintenanceSchedule
     {
         public string DocumentIncarnation { get; set; }
@@ -32,6 +34,7 @@ public MaintenanceSchedule(MaintenanceSchedule other)
     }
 
     // https://docs.microsoft.com/en-us/azure/virtual-machines/windows/scheduled-events#query-for-events
+    [Serializable]
     public class MaintenanceEvent
     {
         public string EventId { get; set; }

AgentInterfaces/SessionHostHeartbeatInfo.cs

@@ -59,6 +59,11 @@ public class SessionHostHeartbeatInfo
         /// </summary>
         public DateTime? NextScheduledMaintenanceUtc { get; set; }
 
+        /// <summary>
+        /// Planned maintenance events
+        /// </summary>
+        public MaintenanceSchedule MaintenanceSchedule { get; set; }
+
         /// <summary>
         /// Used by some legacy games such as Forza 5 for security handshake with the game client.
         /// </summary>