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Cascading Deletion in Entity Framework

So, I have two tables: Invoices and InvoiceItems. When I delete an invoice, I would like all invoiceItems related to it to be deleted.

I updated the relationship in SQL Server to cascade deletion when deleting an invoice. However, the Entity Framework did not recognize this change, but I read that I need to manually update EDMX to perform a cascading deletion.

Well in the design of my EDMX, I clicked on the relationship between the two tables and checked the properties to try and set my cascading delete

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As you can see, there are two OnDelete properties: End1 OnDelete and End2 OnDelete

Which one do I need to install in Cascade?

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End1 (I.e -, -), .

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, , InvoiceItems Invoice, - , , , , OnDelete -, , - , , - "-". End1.

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