AuthenticationModuleElement.cs

using System.Configuration;

namespace System.Net.Configuration
{
    public sealed class AuthenticationModuleElement : ConfigurationElement
    {
        private ConfigurationPropertyCollection properties = new ConfigurationPropertyCollection();

        private readonly ConfigurationProperty type = new ConfigurationProperty("type", typeof(string), null, ConfigurationPropertyOptions.IsKey);

        protected internal override ConfigurationPropertyCollection Properties
        {
            protected get
            {
                return properties;
            }
        }

        [ConfigurationProperty("type", IsRequired = true, IsKey = true)]
        public string Type
        {
            get
            {
                return (string)base[type];
            }
            set
            {
                base[type] = value;
            }
        }

        internal string Key => Type;

        public AuthenticationModuleElement()
        {
            properties.Add(type);
        }

        public AuthenticationModuleElement(string typeName)
            : this()
        {
            if (typeName != (string)type.DefaultValue)
            {
                Type = typeName;
            }
        }
    }
}