ADO.NET tableadapter add/update/delete

Question

I'm using the table adapter in C# where visual studio generates the code for you. I have inserts and updates working just fine using the following code.

However when trying to delete using the .update it gives me the following error.

Update requires a valid DeleteCommand when passed DataRow collection with deleted rows.

this.workersTableAdapter.Update(this.nursery_dbDataSet_workers.workers);