Windows Registry based .NET Core Configuration Provider

Allows loading configuration data from a Windows Registry key.

Usage

Install NuGet package

Install-Package TBC.Common.Configuration.Registry

dotnet add package TBC.Common.Configuration.Registry

<PackageReference Include="TBC.Common.Configuration.Registry" Version="2.1.0" />

Example: Add Windows Registry provider to builder pipeline

public static class Program
{
    // ...

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            })
            .ConfigureAppConfiguration((builderContext, config) =>
            {
                if (OperatingSystem.IsWindows())
                {
                    config.AddWindowsRegistry(@"SOFTWARE\MyCompany\MyApp");
                }
            });
}

Example: Add Windows Registry provider to builder pipeline (Minimal API)

var builder = WebApplication.CreateBuilder(args);

if (OperatingSystem.IsWindows())
{
    builder.Configuration.AddWindowsRegistry(@"SOFTWARE\MyCompany\MyApp");
}

// ...

Example: A .REG file to import into Windows Registry

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\MyCompany]

[HKEY_LOCAL_MACHINE\Software\MyCompany\MyApp]

[HKEY_LOCAL_MACHINE\Software\MyCompany\MyApp\MyConfig]

; Numbers in .REG files can only be hexadecimal

[HKEY_LOCAL_MACHINE\Software\MyCompany\MyApp\MyConfig\DefaultConnection]
"ConnectionString"="Server=example.com; Integrated Security=True; Database=MyDB"
"Provider"="System.Data.SqlClient"
"TimeoutSeconds"=dword:00000078

[HKEY_LOCAL_MACHINE\Software\MyCompany\MyApp\MyConfig\MyWebService]
"Url"="https://example.com/myapi"
"ApiKey"="VGVzdFNlcnZpY2U="

[HKEY_LOCAL_MACHINE\Software\MyCompany\MyApp\MyConfig\MyUsers]

; Example: array/list/collection values

[HKEY_LOCAL_MACHINE\Software\MyCompany\MyApp\MyConfig\MyUsers\0]
@="User1"

[HKEY_LOCAL_MACHINE\Software\MyCompany\MyApp\MyConfig\MyUsers\1]
@="User2"

[HKEY_LOCAL_MACHINE\Software\MyCompany\MyApp\MyConfig\MyUsers\2]
@="User3"

Example: A corresponding IOptions class

Create an IOptions<T> implementation:

public class MyConfigOptions : IOptions<MyConfigOptions>
{
    public MyConfigOptions Value => this;

    public DatabaseConfig DefaultConnection { get; set; }
    public WebServiceConfig MyWebService { get; set; }
    public List<string> MyUsers { get; set; }
}

public record DatabaseConfig
{
    public string ConnectionString { get; set; }
    public string Provider { get; set; }
    public int TimeoutSeconds { get; set; }
}

public record WebServiceConfig
{
    public string Url { get; set; }
    public string ApiKey { get; set; }
}

Register options in Startup.ConfigureServices() method:

services.AddOptions<MyConfigOptions>().BindConfiguration("MyConfig");

Now you can inject IOptions<MyConfigOptions> into transient services and IOptionsMonitor<MyConfigOptions> into singleton ones.