Add Aspire upgrade code samples

AspireVersionUpgrade/Aspire8App/AspireApp.ApiService/Program.cs

@@ -0,0 +1,49 @@
+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();