diff --git a/PoweredSoft.DynamicLinq/Helpers/QueryableHelpers.cs b/PoweredSoft.DynamicLinq/Helpers/QueryableHelpers.cs
index e439333..57fac38 100644
--- a/PoweredSoft.DynamicLinq/Helpers/QueryableHelpers.cs
+++ b/PoweredSoft.DynamicLinq/Helpers/QueryableHelpers.cs
@@ -77,7 +77,7 @@ namespace PoweredSoft.DynamicLinq.Helpers
             return ret;            
         }
 
-        internal static IQueryable GroupBy(IQueryable query, Type type, List<(string path, string propertyName)> parts)
+        public static IQueryable GroupBy(IQueryable query, Type type, List<(string path, string propertyName)> parts)
         {
             // EXPRESSION
             var parameter = Expression.Parameter(type, "t");
@@ -95,6 +95,10 @@ namespace PoweredSoft.DynamicLinq.Helpers
 
             var anonymousType = TypeHelpers.CreateSimpleAnonymousType(fields);
 
+            var constructorTypes = fields.Select(t => t.type).ToArray();
+            var constructor = anonymousType.GetConstructor(constructorTypes);
+            var newExpression = Expression.New(constructor, partExpressions);
+            var genericMethod = Constants.GroupByMethod.MakeGenericMethod(type, anonymousType);
 
             return query;
         }
diff --git a/PoweredSoft.DynamicLinq/Helpers/TypeHelpers.cs b/PoweredSoft.DynamicLinq/Helpers/TypeHelpers.cs
index f2a5a18..2a7bb2a 100644
--- a/PoweredSoft.DynamicLinq/Helpers/TypeHelpers.cs
+++ b/PoweredSoft.DynamicLinq/Helpers/TypeHelpers.cs
@@ -35,6 +35,12 @@ namespace PoweredSoft.DynamicLinq.Helpers
             return ret;
         }
 
+        /// <summary>
+        /// Use this to create anonymous type concstructor for LINQ queries :)
+        /// https://stackoverflow.com/questions/6879279/using-typebuilder-to-create-a-pass-through-constructor-for-the-base-class
+        /// </summary>
+        /// <param name="fields"></param>
+        /// <returns></returns>
         internal static TypeInfo CreateSimpleAnonymousType(List<(Type type, string name)> fields)
         {
             // DYNAMIC TYPE CREATION