# <bindingExtensions>

This section enables the use of a user defined binding from a machine or application configuration file. You can add a user defined binding to this collection by using the add keyword, and setting the type attribute of the element to a user defined binding, as well as the name attribute to the name of the user defined binding.

Binding extensions enable the user to create user-defined bindings for use as part an endpoint configuration. Programmatically, a binding extension is a type that implements the abstract class Binding.

The following example uses the add element, as well as the name attribute to add a binding extension to the bindingElementExtensions section of the configuration file.

<system.serviceModel>
<extensions>
<bindingExtensions>
type="Microsoft.ServiceModel.Samples.MyBinding, MyBinding,
Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
</bindingExtensions>
</extensions>
</system.serviceModel>


To add configuration abilities to the element, the user needs to write and register a bindingSection element. For more information on this, see the System.Configuration documentation.

After the element and its configuration type are defined, the extension can be used as part of an endpoint as shown in the following example.

<services>
<service name="MyService">