Code-First Entity Framework inserting data with custom ID

you can use the following attribute

[Key, DatabaseGenerated(DatabaseGeneratedOption.None)]

on the key to your class or using fluentAPI

modelBuilder.Entity<Address>().Property(p => p.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.None);

In EF Core you can use:

builder.Property(x => x.Id).ValueGeneratedNever();

[DatabaseGenerated(DatabaseGeneratedOption.None)]

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