Add Postgres example

Postgres/Postgres.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27130.2024
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Postgres", "Postgres\Postgres.csproj", "{9C99EB70-BB57-4D41-876D-B35234DC4E39}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{9C99EB70-BB57-4D41-876D-B35234DC4E39}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9C99EB70-BB57-4D41-876D-B35234DC4E39}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9C99EB70-BB57-4D41-876D-B35234DC4E39}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9C99EB70-BB57-4D41-876D-B35234DC4E39}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {5BC14972-1FF4-49F1-A51F-3885C2F43261}
+	EndGlobalSection
+EndGlobal

Postgres/Postgres/Controllers/AccountController.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Logging;
+using Postgres.Data;
+
+namespace Postgres.Controllers
+{
+    [Route("[controller]/[action]")]
+    public class AccountController : Controller
+    {
+        private readonly SignInManager<ApplicationUser> _signInManager;
+        private readonly ILogger _logger;
+
+        public AccountController(SignInManager<ApplicationUser> signInManager, ILogger<AccountController> logger)
+        {
+            _signInManager = signInManager;
+            _logger = logger;
+        }
+
+        [HttpPost]
+        [ValidateAntiForgeryToken]
+        public async Task<IActionResult> Logout()
+        {
+            await _signInManager.SignOutAsync();
+            _logger.LogInformation("User logged out.");
+            return RedirectToPage("/Index");
+        }
+    }
+}

Postgres/Postgres/Data/ApplicationDbContext.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
+
+namespace Postgres.Data
+{
+    public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
+    {
+        public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
+            : base(options)
+        {
+        }
+
+        protected override void OnModelCreating(ModelBuilder builder)
+        {
+            base.OnModelCreating(builder);
+            // Customize the ASP.NET Identity model and override the defaults if needed.
+            // For example, you can rename the ASP.NET Identity table names and more.
+            // Add your customizations after calling base.OnModelCreating(builder);
+        }
+    }
+}

Postgres/Postgres/Data/ApplicationUser.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Identity;
+
+namespace Postgres.Data
+{
+    // Add profile data for application users by adding properties to the ApplicationUser class
+    public class ApplicationUser : IdentityUser
+    {
+    }
+}

Postgres/Postgres/Data/Contact.cs

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+namespace Postgres.Data
+{
+    public class Contact
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public string Address { get; set; }
+        public string City { get; set; }
+        public string Subregion { get; set; }
+        public string PostalCode { get; set; }
+        public string Phone { get; set; }
+        public string Email { get; set; }       
+    }
+}

Postgres/Postgres/Data/ContactsDbContext .cs

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+using Microsoft.EntityFrameworkCore;
+
+namespace Postgres.Data
+{
+    public class ContactsDbContext : DbContext
+    {
+        public DbSet<Contact> Contacts { get; set; }
+
+        public ContactsDbContext(DbContextOptions<ContactsDbContext> options)
+            : base(options)
+        {
+
+        }
+    }
+}