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Editorial Team
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Asked: 2026-05-27T02:42:24+00:00

What is the best way to create a one to many relationship between two

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What is the best way to create a one to many relationship between two objects where one is a generic type? Is it even possible? What I mean is the following:

I have a Project object and the project can have multiple invoice dates

public class Project
{
    //...
    public List<DateTime> InvoiceDates;
    //...
}

I would like it to end up with one to many relationship in the Database. Do I have to wrap the DateTime object into my own object and define the navigation properties to have it created?

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1 Answer

  1. Editorial Team

    Do I have to wrap the DateTime object into my own object and define
    the navigation properties to have it created?

    Yes. Entities must be reference types ( = class ) and DateTime is a struct. List<DateTime> is also not a primitive type which could be mapped to a column type in the database. So, you can only create an entity for this with its own table and a one-to-many relationship.

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