I’m trying to Bind a Dictionary<string,string> to a configuration section like this:

[TestFixture]
public class When_binding_a_configuration_section
{
  [Test]
  public void should_contain_section()
  {
    var config = new ConfigurationBuilder()
      .AddInMemoryCollection()
      .Build();

    var dict = new Dictionary<string, string>()
    {
      { "Key", "Value" }
    };

    config.Bind("Section", dict);
    var section = config.GetSection("Section");
    section.GetSection("Section").ShouldNotBeNull(); // true
    section["Key"].ShouldBe("Value"); // false
  }
}

The first assertion succeeds while the section one fails.

What am I doing wrong here?