linq to sql batch delete

Question

I have the following DB: Posts which have an Id, Tags also with Id, and TagsToPosts table which have T

Answer 1

You can't do this with LINQ-to-SQL.

LINQ-to-SQL is not good for batch operations - it can't do batch inserts, it can't do batch updates, and it can't do batch deletes. Every object in your collection is treated individually. You can do all the operations in one transaction, but there will always be a query for each record.

MSDN

A better option is to write a stored procedure that will do what you want.