Entity Framework Core and One-to-One Relation: Duplicate entry

Entity Framework core one to one relationship generate one to many in SQL Server

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Two one-to-one relations to the same table on Entity Framework Core

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Configuring one-to-many and one-to-one relationship in Entity Framework Core

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Entity Framework Core fluent api One-To-Many and One-To-One produces duplicate foreign key

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One-to-one and one-to-many on the same entity in Entity Framework

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One-to-one relation + on-to-many relation using same entity

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Entity Framework Core 2 one to one relationship "on one table"

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Entity Framework Core zero-or-one to zero-or-one relation

Considering these classes:...public class A { public int Id {get; set;} public int? BId {get; set;} public B B {get; set;} } public class B { public int Id {get; set;} public int? AId {get; set;} public A A {get; set;} } ...next, using Fluent API... modelBuilder.Entity<A>() .HasOne(a => a.B) ...

EF Core One to One relationship on many tables allows duplicate entries

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Can't map model with a couple of one to one relations with Entity Framework Core

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