ModelElement.AddExtension Method (ModelElement, ExtensionElement)

Extend the specified ModelElement with a specified extension. An InvalidOperationException will be thrown if the element already has an extension of the same type.

Namespace:  Microsoft.VisualStudio.Modeling
Assembly:  Microsoft.VisualStudio.Modeling.Sdk.12.0 (in Microsoft.VisualStudio.Modeling.Sdk.12.0.dll)

Syntax

'Declaration
Public Shared Function AddExtension ( _
    element As ModelElement, _
    extension As ExtensionElement _
) As ExtensionElement

public static ExtensionElement AddExtension(
    ModelElement element,
    ExtensionElement extension
)

public:
static ExtensionElement^ AddExtension(
    ModelElement^ element, 
    ExtensionElement^ extension
)

static member AddExtension : 
        element:ModelElement * 
        extension:ExtensionElement -> ExtensionElement

public static function AddExtension(
    element : ModelElement, 
    extension : ExtensionElement
) : ExtensionElement

Parameters

• element
  Type: Microsoft.VisualStudio.Modeling.ModelElement

  ModelElement to be extended

• extension
  Type: Microsoft.VisualStudio.Modeling.ExtensionElement

  The ExtensionElement to be added

Return Value

Type: Microsoft.VisualStudio.Modeling.ExtensionElement
The added extension

Remarks

Although attempts to add a duplicate extension type are caught here, there are other cases where extensions may clash by contributing duplicate properties or roles, for example when two extensions are added that inherit from a common base that defines IMS properties and/or roles. Such cases are detected by IMergeElements implementation on ModelElement, but not by this low-level API

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

ModelElement Class

AddExtension Overload

Microsoft.VisualStudio.Modeling Namespace