Add project

Api/Database/Entities/BaseEntity.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Api.Database.Entities;
+
+public abstract class BaseEntity
+{
+    [Key]
+    [Column("Id")]
+    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+    public int Id { get; set; }
+}

Api/Database/Entities/BaseEntityGuid.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Api.Database.Entities;
+
+public abstract class BaseEntityGuid
+{
+    [Key]
+    [Column("Id")]
+    [DatabaseGenerated(DatabaseGeneratedOption.None)]
+    public Guid Id { get; set; } = Guid.CreateVersion7();
+
+    [Column("CreatedAt")]
+    public DateTime CreatedAt { get; set; } = DateTime.Now;
+
+    [Column("LastModifiedAt")]
+    public DateTime LastModifiedAt { get; set; } = DateTime.Now;
+}

Api/Database/Entities/Season.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Api.Database.Entities;
+
+[Table("Seasons")]
+public class Season : BaseEntity
+{
+    [Column("Name")]
+    [NotNull]
+    [MaxLength(20)]
+    public string? Name { get; set; }
+
+    [Column("StartDate")]
+    [NotNull]
+    public DateOnly StartDate { get; set; }
+
+    [Column("EndDate")]
+    [NotNull]
+    public DateOnly EndDate { get; set; }
+}

Api/Database/Entities/Specialization.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Api.Database.Entities;
+
+[Table("Specializations")]
+public class Specialization : BaseEntity
+{
+    [Column("Name")]
+    [NotNull]
+    [MaxLength(200)]
+    public string? Name { get; set; }
+
+    [Column("ShortName")]
+    [NotNull]
+    [MaxLength(10)]
+    public string? ShortName { get; set; }
+}

Api/Database/Entities/Student.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Api.Database.Entities;
+
+[Table("Students")]
+public class Student : BaseEntityGuid
+{
+    [Column("FirstName")]
+    [NotNull]
+    [MaxLength(50)]
+    public string? FirstName { get; set; }
+
+    [Column("LastName")]
+    [NotNull]
+    [MaxLength(50)]
+    public string? LastName { get; set; }
+
+    [Column("AlbumNumber")]
+    [NotNull]
+    [MaxLength(6)]
+    public string? AlbumNumber { get; set; }
+}

Api/Database/Entities/Subject.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Api.Database.Entities;
+
+[Table("Subjects")]
+public class Subject : BaseEntity
+{
+    [Column("Name")]
+    [NotNull]
+    [MaxLength(200)]
+    public string? Name { get; set; }
+
+    [Column("ShortName")]
+    [NotNull]
+    [MaxLength(10)]
+    public string? ShortName { get; set; }
+}