Programmatically add Aggregate Transform - Count Distinct to SSIS package

Question

I am working on programmatically creating Aggregate transform with aggregation type as count distinct and i am able to create other aggregations like min,max,count.. but when it comes to count distinct i am getting below error

The component has detected potential metadata corruption during validation. Error at Data Flow Task - Load Count Dist [Aggregate - All [2]]: The "Aggregate - All.Outputs[Aggregate Output 1].Columns[col1]" is missing the required property "CountDistinctScale". The object is required to have the specified custom property.

I am unable to find "CountDistinctScale" custom property as this custom property doesn't exit for other aggregation and magically appears when count distinct is selected,is there a method which i need to call to create new custom property?

I understand there are not a lot of people who know how to programmatically create package, please help me find someone with knowledge or suggest me how i can get some help.

IDTSComponentMetaData100 Aggregate = pipeline.ComponentMetaDataCollection.New();
            Aggregate.ComponentClassID = app.PipelineComponentInfos["Aggregate"].CreationName;
            // Get the design time instance of the derived column
            var DesignAggregate = Aggregate.Instantiate();
            DesignAggregate.ProvideComponentProperties();        //design time

            Aggregate.Name = "AggregateComponent";               

            IDTSPath100 AggregatePath = pipeline.PathCollection.New();
            AggregatePath.AttachPathAndPropagateNotifications(pipeline.ComponentMetaDataCollection[Prev_Transform.Transformation_Name].OutputCollection[Prev_Transform.Output_Number], Aggregate.InputCollection[0]);


            //update the metadata for the derived columns
            DesignAggregate.AcquireConnections(null);
            DesignAggregate.ReinitializeMetaData();
            DesignAggregate.ReleaseConnections();


            // Mark the columns we are joining on
            IDTSInput100 AggregateInput = Aggregate.InputCollection[0];
            IDTSInputColumnCollection100 AggregateInputColumns = AggregateInput.InputColumnCollection;
            IDTSVirtualInput100 AggregateVirtualInput = AggregateInput.GetVirtualInput();
            IDTSVirtualInputColumnCollection100 AggregateVirtualInputColumns = AggregateVirtualInput.VirtualInputColumnCollection;

            IDTSOutput100 AggregateoutputCollection = Aggregate.OutputCollection[0];

            // Note: input columns should be marked as READONLY
            foreach (IDTSVirtualInputColumn100 vColumn in AggregateVirtualInputColumns)
            {
                int sourceColumnLineageId = AggregateVirtualInput.VirtualInputColumnCollection[vColumn.Name].LineageID;
                DesignAggregate.SetUsageType(AggregateInput.ID, AggregateVirtualInput, sourceColumnLineageId, DTSUsageType.UT_READONLY);

                // create a new output column
                IDTSOutputColumn100 newOutputColumn = DesignAggregate.InsertOutputColumnAt(AggregateoutputCollection.ID, 0,  vColumn.Name, string.Empty);

                // set the data type porperties to the same values as these of the input column   
                newOutputColumn.SetDataTypeProperties(AggregateVirtualInput.VirtualInputColumnCollection[vColumn.Name].DataType, AggregateVirtualInput.VirtualInputColumnCollection[vColumn.Name].Length, 0, 0, AggregateVirtualInput.VirtualInputColumnCollection[vColumn.Name].CodePage);

                newOutputColumn.MappedColumnID = 0;
                for (int i = 0; i < newOutputColumn.CustomPropertyCollection.Count; i++)
                {
                    IDTSCustomProperty100 property = newOutputColumn.CustomPropertyCollection[i];
                    switch (property.Name)
                    {
                        case "AggregationColumnId":
                            property.Value = sourceColumnLineageId;
                            break;
                        case "AggregationType":
                            property.Value = 3;
                            break;
                        case "IsBig":
                            property.Value = 1;
                            break;
                        case "AggregationComparisonFlags":
                            property.Value = 0;
                            break;
                    }
                }

            }