Add Aspire upgrade code samples

AspireVersionUpgrade/Aspire9App/AspireApp.ApiService/AspireApp.ApiService.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Aspire.Microsoft.EntityFrameworkCore.SqlServer" Version="9.2.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\AspireApp.ServiceDefaults\AspireApp.ServiceDefaults.csproj" />
+  </ItemGroup>
+
+</Project>

AspireVersionUpgrade/Aspire9App/AspireApp.ApiService/Models/WeatherForecast.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace AspireApp.ApiService.Models;
+
+public class WeatherForecast
+{
+    [Key]
+    public int Id { get; set; }
+
+    public DateOnly Date { get; set; }
+
+    public int TemperatureC { get; set; }
+
+    public string? Summary { get; set; }
+
+    [NotMapped]
+    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
+}

AspireVersionUpgrade/Aspire9App/AspireApp.ApiService/Program.cs

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+using AspireApp.ApiService;
+using AspireApp.ApiService.Models;
+using Microsoft.AspNetCore.Mvc;
+
+var builder = WebApplication.CreateBuilder(args);
+
+builder.AddServiceDefaults();
+
+builder.Services.AddProblemDetails();
+builder.AddSqlServerDbContext<WeatherDbContext>("sqldb");
+
+var app = builder.Build();
+
+app.UseExceptionHandler();
+
+var summaries = new[]
+{
+    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
+};
+
+using (var scope = app.Services.CreateScope())
+{
+    var context = scope.ServiceProvider.GetRequiredService<WeatherDbContext>();
+    context.Database.EnsureCreated();
+
+    if (!context.WeatherForecasts.Any())
+    {
+        foreach (var index in Enumerable.Range(1, 5))
+        {
+            context.WeatherForecasts.Add(new WeatherForecast
+            {
+                Date = DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
+                TemperatureC = Random.Shared.Next(-20, 55),
+                Summary = summaries[Random.Shared.Next(summaries.Length)]
+            });
+
+            context.SaveChanges();
+        }
+    }
+}
+
+app.MapGet("/weatherforecast", ([FromServices] WeatherDbContext context) =>
+{
+    return context.WeatherForecasts.ToArray();
+});
+
+app.MapDefaultEndpoints();
+
+app.Run();

AspireVersionUpgrade/Aspire9App/AspireApp.ApiService/Properties/launchSettings.json

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+{
+  "$schema": "https://json.schemastore.org/launchsettings.json",
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "weatherforecast",
+      "applicationUrl": "http://localhost:5423",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "weatherforecast",
+      "applicationUrl": "https://localhost:7598;http://localhost:5423",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

AspireVersionUpgrade/Aspire9App/AspireApp.ApiService/WeatherDbContext.cs

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+using AspireApp.ApiService.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace AspireApp.ApiService;
+
+public class WeatherDbContext : DbContext
+{
+    public WeatherDbContext(DbContextOptions<WeatherDbContext> options) : base(options)
+    {
+    }
+
+    public DbSet<WeatherForecast> WeatherForecasts { get; set; }
+}

AspireVersionUpgrade/Aspire9App/AspireApp.ApiService/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

AspireVersionUpgrade/Aspire9App/AspireApp.ApiService/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}