Is there a Radzen component to add "edit" and "add" to the datagrid or do I just need to program that with straight c#?
There is no such component.
You can refer this sample to add/edit the grid.
I'm sorry I have one more question for you.
this is my code
void OnCreateRow(Order order)
these are the errors I'm getting.
any ideas? I'm sure its simple but clearly not for me.
Refer to sample projects here to get a fair idea of how to use radzen in your application