I'm not sure what you are asking. This error message is pretty clear to me and explains in detail why it's not working. You cannot paste to add new rows to a collection, pasting will only paste over existing cells.

If you want to add the ability to paste new rows into a collection, then you would have to implement that yourself.

Regarding the context menu, there is no built-in context menu, but you could easily add one to the grid and call the PerformMultiCellOperation method when the user clicks on one of your context menu items.

This is the error I am getting when I am trying to cut 3 rows and paste them back in another group.

I made it to work. It is working fine with ctrl+c and ctrl+v. But how come I can make it to work the same way using contextmenu cut/copy/paste....

Also one more problem is- when I am copying the row from one group and went into another group,click on a row and paste(ctrl+V)  it is actually replacing the row which i have selected in, instead of putting the row above or below the row.

How to make the paste operation, paste the row before or after the row in the second group instead of replacing the row.

I didn't understand what do you mean by SelectTypeRow

 I didn't understand what do you mean by SelectTypeRow?