How to load appsetting.json section into Dictionary in .NET Core?

Question

I am familiar w/ loading an appsettings.json section into a strongly typed object in .NET Core startup.cs. For example:

public class CustomSection 
{
   publ         


        

Answer 1

In .NET Core 3.1 you can do something like the following...

appsettings.json:

{
  "myConfig": {
    "foo": "bar",
    "myMappings": {
      "key1": "value1",
      "key2": "value2"
    }
  }
}

A configuration model

MyConfig.cs

public class MyConfig
{
    public string Foo { get; set; }
    public Dictionary MyMappings { get; set; }
}

Startup.cs:

public void ConfigureServices(IServiceCollection services)
{
    services.Configure(configuration.GetSection("myConfig"));

Class using the options:

public class OptionsUsingClass
{
    public OptionsUsingClass(IOptions myConfigOptions)
    {
        // Be wary of nulls in real code.
        var myConfig = myConfigOptions.Value;

        // Examples with the above data.
        myConfig.Foo.Should().Be("bar");

        myConfig.MyMappings["key1"].Should().Be("value1");
        myConfig.MyMappings["key2"].Should().Be("value2");
    }

This was how I used appsettings.json dictionary mappings.