I posted a post a while ago and had the desired solution.
However, in this case, there was only one grid view in the tab control and the other items were of different types.
Now I need multiple gridviews inside the tab control.
If you add multiple gridviews, an error like the link above will occur.
The first gridview passes, but errors start in the remaining 2nd and 3rd gridviews.
The attached example is just adding TabItems from the previous link and deferring InsertAdditionalContentControl .
How to solve this?