diff --git a/dotnet/src/dotnetframework/GxClasses/Core/GXApplication.cs b/dotnet/src/dotnetframework/GxClasses/Core/GXApplication.cs
index 96b8eccf2..56219e869 100644
--- a/dotnet/src/dotnetframework/GxClasses/Core/GXApplication.cs
+++ b/dotnet/src/dotnetframework/GxClasses/Core/GXApplication.cs
@@ -44,6 +44,7 @@ namespace GeneXus.Application
 #endif
 	using System.Threading;
 	using System.Security.Claims;
+	using System.Security;
 
 	public interface IGxContext
 	{
@@ -1550,7 +1551,9 @@ static public string StdClassesVersion()
 
 		public MessageQueueTransaction MQTransaction
 		{
+			[SecuritySafeCritical]
 			get { return _mqTransaction; }
+			[SecuritySafeCritical]
 			set
 			{
 				_mqTransaction = value;