Cant select graphics for editing unless create new graphic with sketchviewmodel

[huzeyfecoşkun]

Hi, I Save graphics into array. Then i clear GraphicsLayer with

GraphicsLayer.removeAll();

then i iterate over my graphics array and add to the graphics layer

after i add to the map i cant select any of them unless i create new item withc sketch view model.

then i can select everyobject. What is the problem. 

Thanks.