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/Demo.cs

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+namespace Secrets;
+
+public class Demo
+{
+  public int Key0 { get; set; }
+  public string? Key1 { get; set; }
+  public string? Key2 { get; set; }
+}

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);

DefensiveProgramming/Secrets/Properties/launchSettings.json

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+{
+  "profiles": {
+    "Secrets": {
+      "commandName": "Project",
+      "environmentVariables": {
+        "CustomEnvValue": "Demo"
+      }
+    }
+  }
+}

DefensiveProgramming/Secrets/Secrets.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <UserSecretsId>PI</UserSecretsId>
+  </PropertyGroup>
+
+  <ItemGroup>    
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.6" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="10.0.6" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="10.0.6" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

DefensiveProgramming/Secrets/appsettings.json

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+{
+  "Name": "Bob",
+  "Demo": {
+    "Key0": 123,
+    "Key1": "something that should not be publicly available"
+  }
+}