diff --git a/dotnet/src/dotnetframework/GxClasses/Services/ReflectionHelper.cs b/dotnet/src/dotnetframework/GxClasses/Services/ReflectionHelper.cs
index b7dde1720..8cd27f4b5 100644
--- a/dotnet/src/dotnetframework/GxClasses/Services/ReflectionHelper.cs
+++ b/dotnet/src/dotnetframework/GxClasses/Services/ReflectionHelper.cs
@@ -14,8 +14,8 @@
 namespace GeneXus.Application
 {
 	public class ReflectionHelper
-    {
-		const string ISO_8601_TIME_SEPARATOR= "T";
+	{
+		const string ISO_8601_TIME_SEPARATOR = "T";
 		const string ISO_8601_TIME_SEPARATOR_1 = ":";
 		public static void CallBCMethod(object instance, String methodName, IList<string> inParametersValues)
 		{
@@ -43,7 +43,8 @@ public static Dictionary<string, object> CallMethodPattern(object instance, Stri
 			MethodInfo methodInfo = instanceType.GetMethod(memberInfo.Name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);
 			return CallMethodImpl(instance, methodInfo, parameters, context);
 		}
-		public static Dictionary<string, object> CallMethod(object instance, String methodName, IDictionary<string, object> parameters, IGxContext context=null)
+
+		public static Dictionary<string, object> CallMethod(object instance, String methodName, IDictionary<string, object> parameters, IGxContext context = null)
 		{
 			MethodInfo methodInfo = instance.GetType().GetMethod(methodName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);
 			return CallMethodImpl(instance, methodInfo, parameters, context);
@@ -80,17 +81,26 @@ public static Dictionary<string, object> GetWrappedParameter(object instance, St
 					inputParameters.Add(methodParameter);
 				}
 			}
-			if (inputParameters.Count == 1 && bodyParameters.Count>1)
+			if (inputParameters.Count == 1)
 			{
-				ParameterInfo pInfo = inputParameters[0];
-				if (pInfo.ParameterType.IsSubclassOf(typeof(GxUserType)))
+				ParameterInfo pInfo = inputParameters[0];				
+				if (pInfo.ParameterType.IsSubclassOf(typeof(GxUserType)) && bodyParameters.Count > 1)
 				{
-					var gxParameterName = GxParameterName(pInfo.Name).ToLower();
-					Dictionary<string, object> parameters = new Dictionary<string,object>();
-					JObject jparms  = new JObject(bodyParameters);
+					string gxParameterName = GxParameterName(pInfo.Name).ToLower();
+					Dictionary<string, object> parameters = new Dictionary<string, object>();
+					JObject jparms = new JObject(bodyParameters);
 					parameters.Add(gxParameterName, jparms);
-					return parameters;			
+					return parameters;
+
 				}
+				if (typeof(IGxCollection).IsAssignableFrom(pInfo.ParameterType) &&  bodyParameters.Count == 1 && bodyParameters.ContainsKey(string.Empty) && bodyParameters[string.Empty] is JArray)
+				{
+					string gxParameterName = GxParameterName(pInfo.Name).ToLower();
+					Dictionary<string, object> parameters = new Dictionary<string, object>();
+					parameters.Add(gxParameterName, bodyParameters[string.Empty]);
+					return parameters;
+				}
+				
 			}
 			return bodyParameters;
 		}