entity framework database first working on models

Question

I am using entity framework db first. how do I add data annotations to the model without putting it into the auto generated model?

I want to avoid losing the work I have done, in case I need to add a new column to the table.

Any small explanation or link would be helpful for me to understand.

thanks,

Andy

Answer 1

You can use a second partial class that is created by you which includes the data annotations you like.

Look here for an answer covering this issue.

Answer 2

I think Code first migrations is what you are looking for.