> For the complete documentation index, see [llms.txt](https://docs.wisej.com/ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/ai/components/api/smartadapter/wisej.ai.smartadapter.extendsattribute.md).

# SmartAdapter.ExtendsAttribute

Namespace: **Wisej.AI**

Assembly: **Wisej.AI** (3.5.0.0)

Represents an attribute that specifies the type a [SmartAdapter](/ai/components/api/smartadapter.md) extends, allowing for multiple extensions if specified.

{% tabs %}
{% tab title="C#" %}

```csharp
public class ExtendsAttribute : Attribute
```

{% endtab %}

{% tab title="VB.NET" %}

```visual-basic
Public Class ExtendsAttribute
    Inherits Attribute
```

{% endtab %}
{% endtabs %}

This attribute can be applied to [SmartAdapter](/ai/components/api/smartadapter.md) classes to indicate that they extend a particular type. It supports specifying the type either by a [Type](#type) object or by a type name string.

## Constructors

### ![](/files/ptrKjmmRoQB76pvrIqh0) ExtendsAttribute(type, allowMultiple)

Initializes a new instance of the [ExtendsAttribute](/ai/components/api/smartadapter/wisej.ai.smartadapter.extendsattribute.md) class with the specified type.

| Name              | Type                                                            | Description                                                            |
| ----------------- | --------------------------------------------------------------- | ---------------------------------------------------------------------- |
| **type**          | [Type](https://docs.microsoft.com/dotnet/api/system.type)       | The type that the class extends.                                       |
| **allowMultiple** | [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean) | Indicates whether multiple extensions are allowed. Default is `false`. |

**Throws:**

* [ArgumentNullException](https://docs.microsoft.com/dotnet/api/system.argumentnullexception)\
  Thrown when the *type* is `null`.

### ![](/files/ptrKjmmRoQB76pvrIqh0) ExtendsAttribute(typeName, allowMultiple)

Initializes a new instance of the [ExtendsAttribute](/ai/components/api/smartadapter/wisej.ai.smartadapter.extendsattribute.md) class with the specified type name.

| Name              | Type                                                            | Description                                                            |
| ----------------- | --------------------------------------------------------------- | ---------------------------------------------------------------------- |
| **typeName**      | [String](https://docs.microsoft.com/dotnet/api/system.string)   | The name of the type that the class extends.                           |
| **allowMultiple** | [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean) | Indicates whether multiple extensions are allowed. Default is `false`. |

**Throws:**

* [ArgumentNullException](https://docs.microsoft.com/dotnet/api/system.argumentnullexception)\
  Thrown when the *typeName* is `null`.

## Properties

### ![](/files/ptrKjmmRoQB76pvrIqh0) AllowMultiple

[Boolean](https://docs.microsoft.com/dotnet/api/system.boolean): Gets a value indicating whether the adapter can extend multiple controls.

### ![](/files/ptrKjmmRoQB76pvrIqh0) Type

[Type](https://docs.microsoft.com/dotnet/api/system.type): Gets the [Type](#type) object that the class extends.

If the type was specified by name, this property attempts to resolve it to a [Type](#type) object.

### ![](/files/ptrKjmmRoQB76pvrIqh0) TypeName

[String](https://docs.microsoft.com/dotnet/api/system.string): Gets the name of the type that the adapter can extend.


---

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