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Editorial Team
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Asked: 2026-05-26T20:31:55+00:00

when trying to query my database with entityframework i get the following error: The

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when trying to query my database with entityframework i get the following error:
The navigation property of type ‘System.Collections.Generic.IEnumerable1[[TASK.Warehouses.Domain.NoteProducts.NoteProduct, TASK.Warehouses.Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]' is not a single implementation of 'System.Collections.Generic.ICollection1[T]’.
what could be the problem and how could i fix it

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1 Answer

  1. Editorial Team

    You wrote Code-First classes that have IEnumerable<T> navigation properties.

    Entity Framework requires that your navigation properties be of type ICollection<T>.

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