DataAnnotations & Model in .Net Core

DataAnnotations is in System.ComponentModel.DataAnnotations.

1.using System.ComponentModel.DataAnnotations;

1.1 [Required]
1.2 [RegularExpression(@"^\d+$", ErrorMessage = "Only number")]
public long Id { get; set; }


1.3[Display(Name = "Color head")]
public string displayOtherName { get; set; }

1.4[Key]
 [Table("view_name")]
    public class EFReservation
    {
      [Key]
      public long keyId { get; set; }
   }

2.using System.ComponentModel.DataAnnotations.Schema;
2.1 [Table("TableName")]
      public class EFBrandConfig{...}

2.2[NotMapped]
public string notMapped { get; set; }

2.3[Column("my_id")]
public string MyID { get; set; }
2.4 [Column(TypeName = "datetime")]
[Required]
    [Display(Name = "Start DateTime")]
    [Column(TypeName = "datetime")]
    public DateTime? Start { get; set; }

3.using System.ComponentModel;
[DefaultValue(0)]
public int myDefaultValue { get; set; }