Property to check whether the instance can be extended and return the interface for extension operation.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)

Syntax

C#
public IExtension ExtensionUtility { get; }
Visual Basic
Public ReadOnly Property ExtensionUtility As IExtension
	Get
Visual C++
public:
property IExtension^ ExtensionUtility {
	IExtension^ get ();
}

Remarks

If the family instance can not support extension operation, it returns nullNothingnullptra null reference (Nothing in Visual Basic)

See Also