diff --git a/Data/ApplicationConext.cs b/Data/ApplicationConext.cs
new file mode 100644
index 0000000..45fb27c
--- /dev/null
+++ b/Data/ApplicationConext.cs
@@ -0,0 +1,26 @@
+using EmployeeManager.Model;
+using Microsoft.EntityFrameworkCore;
+
+namespace EmployeeManager.Data
+{
+    public class ApplicationConext : DbContext
+    {
+        public DbSet<Employee> Employees { get; set; }
+        public DbSet<PhysicalPerson> PhysicalPersons { get; set; }
+        public DbSet<Salary> Salaries { get; set; }
+        public DbSet<Vacation> Vacations { get; set; }
+
+        public ApplicationConext()
+        {
+            Database.EnsureCreated();
+        }
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            if (!optionsBuilder.IsConfigured)
+            {
+                optionsBuilder.UseNpgsql("Host=localhost;Database=EmployeeManagerDataBase;Username=postgres;Password=23859");
+            }
+            base.OnConfiguring(optionsBuilder);
+        }
+    }
+}
diff --git a/EmployeeManager.csproj b/EmployeeManager.csproj
index e3e33e3..be33c80 100644
--- a/EmployeeManager.csproj
+++ b/EmployeeManager.csproj
@@ -8,4 +8,23 @@
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.10" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.10">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="8.0.10">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.1" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="8.0.1" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.10" />
+  </ItemGroup>
+
 </Project>
diff --git a/Migrations/20241126112638_InitDB.Designer.cs b/Migrations/20241126112638_InitDB.Designer.cs
new file mode 100644
index 0000000..e07b64e
--- /dev/null
+++ b/Migrations/20241126112638_InitDB.Designer.cs
@@ -0,0 +1,203 @@
+// <auto-generated />
+using System;
+using EmployeeManager.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace EmployeeManager.Migrations
+{
+    [DbContext(typeof(ApplicationConext))]
+    [Migration("20241126112638_InitDB")]
+    partial class InitDB
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.10")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("EmployeeManager.Model.Employee", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<float>("Bid")
+                        .HasColumnType("real");
+
+                    b.Property<DateTime?>("EndJob")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("NameJob")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PartTimeJob")
+                        .HasColumnType("text");
+
+                    b.Property<int?>("PhysicalPersonsId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("StartJob")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhysicalPersonsId");
+
+                    b.ToTable("Employees");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.PhysicalPerson", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Address")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("Birthday")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Gender")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("NamePhysicalPersons")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PatronomicPhysicalPersons")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("SurnamePhysicalPersons")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Telephone")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("PhysicalPersons");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Salary", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CountHours")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime?>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int?>("EmployeeId")
+                        .HasColumnType("integer");
+
+                    b.Property<bool>("Passed")
+                        .HasColumnType("boolean");
+
+                    b.Property<float?>("Premium")
+                        .HasColumnType("real");
+
+                    b.Property<float>("PriceHour")
+                        .HasColumnType("real");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Vacation", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int?>("EmployeeId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("EndData")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<bool>("Passed")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("StartData")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Vacations");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Employee", b =>
+                {
+                    b.HasOne("EmployeeManager.Model.PhysicalPerson", "PhysicalPersons")
+                        .WithMany("Employees")
+                        .HasForeignKey("PhysicalPersonsId");
+
+                    b.Navigation("PhysicalPersons");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Salary", b =>
+                {
+                    b.HasOne("EmployeeManager.Model.Employee", "Employees")
+                        .WithMany("Salarys")
+                        .HasForeignKey("EmployeeId");
+
+                    b.Navigation("Employees");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Vacation", b =>
+                {
+                    b.HasOne("EmployeeManager.Model.Employee", "Employees")
+                        .WithMany("Vacations")
+                        .HasForeignKey("EmployeeId");
+
+                    b.Navigation("Employees");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Employee", b =>
+                {
+                    b.Navigation("Salarys");
+
+                    b.Navigation("Vacations");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.PhysicalPerson", b =>
+                {
+                    b.Navigation("Employees");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Migrations/20241126112638_InitDB.cs b/Migrations/20241126112638_InitDB.cs
new file mode 100644
index 0000000..9fb0730
--- /dev/null
+++ b/Migrations/20241126112638_InitDB.cs
@@ -0,0 +1,133 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace EmployeeManager.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitDB : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "PhysicalPersons",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    NamePhysicalPersons = table.Column<string>(type: "text", nullable: false),
+                    SurnamePhysicalPersons = table.Column<string>(type: "text", nullable: false),
+                    PatronomicPhysicalPersons = table.Column<string>(type: "text", nullable: false),
+                    Birthday = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    Gender = table.Column<string>(type: "text", nullable: false),
+                    Address = table.Column<string>(type: "text", nullable: false),
+                    Telephone = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_PhysicalPersons", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Employees",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    NameJob = table.Column<string>(type: "text", nullable: false),
+                    StartJob = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    EndJob = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    PartTimeJob = table.Column<string>(type: "text", nullable: true),
+                    Bid = table.Column<float>(type: "real", nullable: false),
+                    PhysicalPersonsId = table.Column<int>(type: "integer", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Employees", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Employees_PhysicalPersons_PhysicalPersonsId",
+                        column: x => x.PhysicalPersonsId,
+                        principalTable: "PhysicalPersons",
+                        principalColumn: "Id");
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Salaries",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    CountHours = table.Column<int>(type: "integer", nullable: false),
+                    PriceHour = table.Column<float>(type: "real", nullable: false),
+                    Premium = table.Column<float>(type: "real", nullable: true),
+                    Date = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    Passed = table.Column<bool>(type: "boolean", nullable: false),
+                    EmployeeId = table.Column<int>(type: "integer", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Salaries", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Salaries_Employees_EmployeeId",
+                        column: x => x.EmployeeId,
+                        principalTable: "Employees",
+                        principalColumn: "Id");
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Vacations",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    StartData = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    EndData = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    Passed = table.Column<bool>(type: "boolean", nullable: false),
+                    EmployeeId = table.Column<int>(type: "integer", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Vacations", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Vacations_Employees_EmployeeId",
+                        column: x => x.EmployeeId,
+                        principalTable: "Employees",
+                        principalColumn: "Id");
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Employees_PhysicalPersonsId",
+                table: "Employees",
+                column: "PhysicalPersonsId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Salaries_EmployeeId",
+                table: "Salaries",
+                column: "EmployeeId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Vacations_EmployeeId",
+                table: "Vacations",
+                column: "EmployeeId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Salaries");
+
+            migrationBuilder.DropTable(
+                name: "Vacations");
+
+            migrationBuilder.DropTable(
+                name: "Employees");
+
+            migrationBuilder.DropTable(
+                name: "PhysicalPersons");
+        }
+    }
+}
diff --git a/Migrations/ApplicationConextModelSnapshot.cs b/Migrations/ApplicationConextModelSnapshot.cs
new file mode 100644
index 0000000..c0a298e
--- /dev/null
+++ b/Migrations/ApplicationConextModelSnapshot.cs
@@ -0,0 +1,200 @@
+// <auto-generated />
+using System;
+using EmployeeManager.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace EmployeeManager.Migrations
+{
+    [DbContext(typeof(ApplicationConext))]
+    partial class ApplicationConextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.10")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("EmployeeManager.Model.Employee", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<float>("Bid")
+                        .HasColumnType("real");
+
+                    b.Property<DateTime?>("EndJob")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("NameJob")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PartTimeJob")
+                        .HasColumnType("text");
+
+                    b.Property<int?>("PhysicalPersonsId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("StartJob")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhysicalPersonsId");
+
+                    b.ToTable("Employees");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.PhysicalPerson", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Address")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("Birthday")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Gender")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("NamePhysicalPersons")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PatronomicPhysicalPersons")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("SurnamePhysicalPersons")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Telephone")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("PhysicalPersons");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Salary", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("CountHours")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime?>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int?>("EmployeeId")
+                        .HasColumnType("integer");
+
+                    b.Property<bool>("Passed")
+                        .HasColumnType("boolean");
+
+                    b.Property<float?>("Premium")
+                        .HasColumnType("real");
+
+                    b.Property<float>("PriceHour")
+                        .HasColumnType("real");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Vacation", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int?>("EmployeeId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("EndData")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<bool>("Passed")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("StartData")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EmployeeId");
+
+                    b.ToTable("Vacations");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Employee", b =>
+                {
+                    b.HasOne("EmployeeManager.Model.PhysicalPerson", "PhysicalPersons")
+                        .WithMany("Employees")
+                        .HasForeignKey("PhysicalPersonsId");
+
+                    b.Navigation("PhysicalPersons");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Salary", b =>
+                {
+                    b.HasOne("EmployeeManager.Model.Employee", "Employees")
+                        .WithMany("Salarys")
+                        .HasForeignKey("EmployeeId");
+
+                    b.Navigation("Employees");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Vacation", b =>
+                {
+                    b.HasOne("EmployeeManager.Model.Employee", "Employees")
+                        .WithMany("Vacations")
+                        .HasForeignKey("EmployeeId");
+
+                    b.Navigation("Employees");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.Employee", b =>
+                {
+                    b.Navigation("Salarys");
+
+                    b.Navigation("Vacations");
+                });
+
+            modelBuilder.Entity("EmployeeManager.Model.PhysicalPerson", b =>
+                {
+                    b.Navigation("Employees");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Model/Employee.cs b/Model/Employee.cs
index 836cb4e..4049531 100644
--- a/Model/Employee.cs
+++ b/Model/Employee.cs
@@ -6,13 +6,13 @@ namespace EmployeeManager.Model
     public class Employee
     {
         public int Id { get; set; }
-        public string NameJob { get; set; }
+        public string NameJob { get; set; } = string.Empty;
         public DateTime StartJob { get; set; }
-        public DateTime EndJob { get; set; }
-        public string PartTimeJob { get; set; }
+        public DateTime? EndJob { get; set; }
+        public string? PartTimeJob { get; set; }
         public float Bid { get; set; }
-        public int PhisicalPersonsId { get; set; }
-        public virtual PhysicalPerson PhisicalPersons { get; set; }
+        public int? PhysicalPersonsId { get; set; }
+        public virtual PhysicalPerson? PhysicalPersons { get; set; }
         public List<Salary> Salarys { get; set; }
         public List<Vacation> Vacations { get; set; }
 
diff --git a/Model/PhysicalPerson.cs b/Model/PhysicalPerson.cs
index 4fd1425..fd28c0b 100644
--- a/Model/PhysicalPerson.cs
+++ b/Model/PhysicalPerson.cs
@@ -9,13 +9,13 @@ namespace EmployeeManager.Model
     public class PhysicalPerson
     {
         public int Id { get; set; }
-        public string Name { get; set; }
-        public string Surname { get; set; }
-        public string Patronomic { get; set; }
+        public string NamePhysicalPersons { get; set; } = string.Empty;
+        public string SurnamePhysicalPersons { get; set; } = string.Empty;
+        public string PatronomicPhysicalPersons { get; set; } = string.Empty;
         public DateTime Birthday { get; set; }
-        public string Gender { get; set; } 
-        public string Address { get; set; }
-        public string Telephone { get; set; } 
+        public string Gender { get; set; } = string.Empty;
+        public string Address { get; set; } = string.Empty;
+        public string Telephone { get; set; } = string.Empty;
         public List<Employee> Employees { get; set; }
     }
 }
diff --git a/Model/Salary.cs b/Model/Salary.cs
index 45ef52e..bf7bdc3 100644
--- a/Model/Salary.cs
+++ b/Model/Salary.cs
@@ -11,10 +11,10 @@ namespace EmployeeManager.Model
         public int Id { get; set; }
         public int CountHours { get; set; }
         public float PriceHour { get; set; }
-        public float Premium { get; set; }
-        public DateTime Date { get; set; }
+        public float? Premium { get; set; }
+        public DateTime? Date { get; set; }
         public bool Passed { get; set; }
-        public int EmployeeId { get; set; }
-        public virtual Employee Employee { get; set; }
+        public int? EmployeeId { get; set; }
+        public virtual Employee? Employees { get; set; }
     }
 }
diff --git a/Model/Vacation.cs b/Model/Vacation.cs
index ad82e86..ac299bb 100644
--- a/Model/Vacation.cs
+++ b/Model/Vacation.cs
@@ -12,7 +12,7 @@ namespace EmployeeManager.Model
         public DateTime StartData { get; set; }
         public DateTime EndData { get; set; }
         public bool Passed { get; set; }
-        public int EmployeeId { get; set; }
-        public virtual Employee Employee { get; set; }
+        public int? EmployeeId { get; set; }
+        public virtual Employee? Employees { get; set; }
     }
 }