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Home/ Questions/Q 530409
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Editorial Team
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Editorial Team
Asked: May 13, 20262026-05-13T09:11:36+00:00 2026-05-13T09:11:36+00:00

Can I extend or use partial classes to add more functions to EntityCollection< Class>

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Can I extend or use partial classes to add more functions to
EntityCollection< Class>

eg.

this is the auto-generated classses from LINQ to SQL

customer.Orders

I want to be able to do

customer.Orders.FindByOrderID(orderID)

but Order is EntityCollection < Order >

Can I make this a partial class or extend it like I can do with just the Order class?

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  1. Editorial Team
    Editorial Team
    2026-05-13T09:11:37+00:00Added an answer on May 13, 2026 at 9:11 am

    Yes I can

    public static class OrderExtension
    {
        public static Order FindByOrderID(this EntityCollection<Order> orders, String orderID)
        {
    
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