this works but still getting some problems
But First Let me explain the actual thing
I have canvas plugin inserted 200x200
then did 48 copied and scattered randomly in layout
I added sprite with small size which i used for click
I set them all in front of all scattered canvas
Now i am able to drag
but this formula doesn't work when some canvas are overlapped
My Event system is
When Mouse Left click on Canvas
== Cursor is over sprite
== Sprite is overlapping with Canvas >> Canvas DragDrop Enabled
++ Else >> Disabled
Every tick >> Set Sprite Position to Canvas