Custom behavior configuration error

Question

I created custom behavior for use with the WCF service to log all errors in the application log. I made BehaviorExtensionElementfor behavior:

public ErrorLoggingBehaviorExtensionElement : BehaviorExtensionElement
{
    public ErrorLoggingBehaviorExtensionElement() { }

    /* - Elements removed for brevity - */
}

I am trying to apply this in my configuration as follows:

<extensions>
  <behaviorExtensions>
    <add name="errorLogging"
         type="ErrorLoggingBehaviorExtensionElement, Logging, Version=1.0.0.0, 
               Culture=neutral, PublicKeyToken=56e8273d901d717f"/>
  </behaviorExtensions>
</extensions>

<services>
  <service name="TestService" behaviorConfiguration="TestServiceBehavior">
    <endpoint address="" 
              binding="wsHttpBinding" 
              contract="Test_Service.ITestService"/>
    <endpoint address="mex" 
              binding="mexHttpBinding" 
              contract="IMetadataExchange"/>
  </service>
</services>

<behaviors>
  <serviceBehaviors>
    <behavior name="TestServiceBehavior">
      <serviceMetadata httpGetEnabled="true"/>
      <errorLogging />
    </behavior>
  </serviceBehaviors>
</behaviors>

NOTE. The "type" attribute in the behavior registration element is actually on the same line in the configuration file to overcome this known problem . Linear breaks have been added for your eyes.

When you try to view the service page, the following application error is generated:

An error occurred while creating the configuration section handler for system.serviceModel / behaviors: no constructor without parameters was specified for this object.

<errorLogging /> , , .

Answer 1

.

, TypeConverterAttribute :

[ConfigurationProperty("level", IsRequired=false)]
[TypeConverter(typeof(EnumConverter))]
public LogLevel Level
{
    get { ... }
    set { ... }
}

EnumConverter, ( , ).

, ConfigurationProperty . - , , EnumConverter<T>, .

, .