Extend the specified ModelElement with a newly instantiated extension of the identified domain type. 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.10.0 (in Microsoft.VisualStudio.Modeling.Sdk.10.0.dll)
Syntax
声明
Public Shared Function AddExtension ( _
    element As ModelElement, _
    extensionClassId As Guid _
) As ExtensionElement
public static ExtensionElement AddExtension(
    ModelElement element,
    Guid extensionClassId
)
public:
static ExtensionElement^ AddExtension(
    ModelElement^ element, 
    Guid extensionClassId
)
static member AddExtension : 
        element:ModelElement * 
        extensionClassId:Guid -> ExtensionElement 
public static function AddExtension(
    element : ModelElement, 
    extensionClassId : Guid
) : ExtensionElement
Parameters
- element
 Type: Microsoft.VisualStudio.Modeling.ModelElement
 ModelElement to be extended
- extensionClassId
 Type: System.Guid
 The domain class id of the type of ExtensionElement to be added
Return Value
Type: Microsoft.VisualStudio.Modeling.ExtensionElement
The newly instantiated and added extension
.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.