Unable to create a custom section for web.config

Question

I created a custom section in the web.config file but it isn\'t able to load my custom type that is going to manage the section.

Here are the definitions:

Answer 1

You need to specify the assembly name as part of the type attribute:

<section
    name="MembershipProviders"
    type="Namespace.TheCustomSection, TheAssemblyNameGoesHere"
    allowLocation="true"
    allowDefinition="Everywhere"
/>

EDIT
I didn't notice that the MembershipProvidersSection class is a nested class.
The type name should be:

MyApp.BusinessObjects.MembershipProviderFactory+MembershipProvidersSection

Answer 2

You are missing assembly name where you are declaring type:

MyApp.BusinessObjects.MembershipProviderFactory.MembershipProvidersSection,?

Take a look at one of my posts about custom configuration: C# WCF System.Configuration.ConfigurationErrorsException: Unrecognized element 'ManagedService'