Unrecognized configuration section

Question

I have created a custom configuration section like below

Answer 1

You need to write a configuration handler to parse this custom section. And then register this custom handler in your config file:

<configSections>
    <section name="mySection" type="MyNamespace.MySection, MyAssembly" />
</configSections>

<mySection>
    <Tabs>
        <Tab name="one" visibility="true"/>
        <Tab name="two" visibility="true"/>
    </Tabs>
</mySection>

Now let's define the corresponding config section:

public class MySection : ConfigurationSection
{
    [ConfigurationProperty("Tabs", Options = ConfigurationPropertyOptions.IsRequired)]
    public TabsCollection Tabs
    {
        get
        {
            return (TabsCollection)this["Tabs"];
        }
    }
}

[ConfigurationCollection(typeof(TabElement), AddItemName = "Tab")]
public class TabsCollection : ConfigurationElementCollection
{
    protected override ConfigurationElement CreateNewElement()
    {
        return new TabElement();
    }

    protected override object GetElementKey(ConfigurationElement element)
    {
        if (element == null)
        {
            throw new ArgumentNullException("element");
        }
        return ((TabElement)element).Name;
    }
}

public class TabElement : ConfigurationElement
{
    [ConfigurationProperty("name", IsRequired = true, IsKey = true)]
    public string Name
    {
        get { return (string)base["name"]; }
    }

    [ConfigurationProperty("visibility")]
    public bool Visibility
    {
        get { return (bool)base["visibility"]; }
    }
}

and now you could access the settings:

var mySection = (MySection)ConfigurationManager.GetSection("mySection");