Entity Framework Core add unique constraint code-first

Question

I can\'t find way to add a unique constraint to my field with using attribute:

public class User
{
    [Required]
    public int Id { get; set; }

    [Requi         


        

Answer 1

For someone who is trying all these solution but not working try this one, it worked for me

protected override void OnModelCreating(ModelBuilder builder)
{

    builder.Entity().Property(t => t.Email).HasColumnAnnotation("Index", new IndexAnnotation(new IndexAttribute("IX_EmailIndex") { IsUnique = true }));

}