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c# - bulk delete in entity framework

I'd like to bulk delete records from a table using linq. There's a post that describes how to do it: Bulk-deleting in LINQ to Entities

var query = from c in ctx.Customers
            where c.SalesPerson.Email == "..."
            select c;

query.Delete();

But the function "Delete" doesn't exist in my var variable.
Furthermore, the function "SubmitChanges" doesn't exist on my context.

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There is an interesting NuGet package that lets you do batch deletes and updates:


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