B2017-247 Added Error Handling for PingSession so that the code will not crash

PROMS/VEPROMS.CSLA.Library/Extension/MultiUserExt.cs

@@ -125,14 +125,22 @@ namespace VEPROMS.CSLA.Library
 		}
 		public List<int> PingSession()
 		{
-			List<int> myList = new List<int>();
-			SessionPing.Execute(this.SessionID);
-			ChangedContents = SessionChangedContents.Execute(this.LastContentChange);
-			ChangedItems = SessionChangedItems.Execute(this.LastContentChange);
-			OwnerInfoList oil = OwnerInfoList.GetBySessionID(this.SessionID);
-			foreach (OwnerInfo oi in oil)
-				myList.Add(oi.OwnerID);
-			return myList;
+			// B2017-247 Add Error handler for PingSession
+			try
+			{
+				List<int> myList = new List<int>();
+				SessionPing.Execute(this.SessionID);
+				ChangedContents = SessionChangedContents.Execute(this.LastContentChange);
+				ChangedItems = SessionChangedItems.Execute(this.LastContentChange);
+				OwnerInfoList oil = OwnerInfoList.GetBySessionID(this.SessionID);
+				foreach (OwnerInfo oi in oil)
+					myList.Add(oi.OwnerID);
+				return myList;
+			}
+			catch (Exception)
+			{
+				return null;
+			}
 		}
 		public void EndSession()
 		{