How to Implement a Custom Configuration Section with a ConfigurationElementCollection in .NET?

Implementing a ConfigurationSection with a ConfigurationElementCollection

You are encountering issues while creating a custom configuration section in your project. Let's break down your questions and provide a comprehensive solution:

App.Config Example

Your App.config file appears to be properly configured. It defines a custom section named "ServicesSection" and its type handler.

ServiceConfig and ServiceCollection

Your ServiceConfig and ServiceCollection classes are correctly defined, matching the expected configuration section structure.

ConfigurationSection Handler

You correctly moved away from using the deprecated IConfigurationSectionHandler interface. Instead, you should create a new class that derives from ConfigurationSection:

public class ServiceConfigurationSection : ConfigurationSection
{
    [ConfigurationProperty("Services", IsDefaultCollection = false)]
    [ConfigurationCollection(typeof(ServiceCollection),
        AddItemName = "add",
        ClearItemsName = "clear",
        RemoveItemName = "remove")]
    public ServiceCollection Services
    {
        get
        {
            return (ServiceCollection)base["Services"];
        }
    }
}

In this class, the "Services" property is defined as a ConfigurationCollection of type ServiceCollection. This sets the foundation for a hierarchical configuration structure.

Consuming Configuration

Once you have defined the ConfigurationSection, you can access its data as follows:

ServiceConfigurationSection serviceConfigSection =
    ConfigurationManager.GetSection("ServicesSection") as ServiceConfigurationSection;

ServiceConfig serviceConfig = serviceConfigSection.Services[0];

By following these steps, you should be able to successfully implement your custom configuration section with a ConfigurationElementCollection.

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