FillFormat of TextHolder

Aspose.Slides Product Family
1

I am attempting to use the cloneSlide function to merge several presentations, but all of the textHolders are created with a solid, white background in the final presentation, despite a transparent background in the original. I have attempted to dynamically change this, after performing the copy, using the code below, without any success. 







For j = 0 To sl.Placeholders.Count - 1
 
If TypeOf sl.Placeholders(j) Is TextHolder Then
 
Dim th As TextHolder = CType(sl.Placeholders(j), TextHolder)
 
th.FillFormat.Type = FillType.NoFill
 
End If
 
Next


 		

 
 
Could you please help me by explaining this behavior and offering possible alternatives?  Thanks.

Eric