PI06 i PI06-1. Docker definitions for MSSQL and Postgres. Data seeder/generator for countries and people. Entity Framework example with variants for Postgres and MSSQL

DefensiveProgramming/Secrets/Program.cs

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+using Microsoft.Extensions.Configuration;
+using Secrets;
+
+var enumerator = Environment.GetEnvironmentVariables().GetEnumerator();
+while (enumerator.MoveNext())
+{
+  Console.WriteLine($"{enumerator.Key} = {enumerator.Value}");
+}
+Console.WriteLine("----------------------------");
+IConfiguration configuration = new ConfigurationBuilder()
+                                   .AddJsonFile("appsettings.json")   //order is important!
+                                   .AddJsonFile("missing_one.json", optional: true)   //
+                                   .AddEnvironmentVariables()    // include Package Microsoft.Extensions.Configuration.EnvironmentVariables                                     
+                                   .AddUserSecrets("PI-Secrets") //package Microsoft.Extensions.Configuration.UserSecrets
+                                   .Build();
+
+Console.WriteLine($"Custom env variable using configuration = " + configuration["CustomEnvValue"]);
+Console.WriteLine($"Name = " + configuration["Name"]);
+Console.WriteLine($"Key0 = " + configuration["Demo:Key0"]); //or Demo__Key0
+
+Demo? demo = configuration.GetSection("Demo").Get<Demo>(); // package Microsoft.Extensions.Configuration.Binder
+Console.WriteLine($"Key1 = " + demo?.Key1);
+Console.WriteLine($"Key2 = " + demo?.Key2);