public virtual IExtensionBase Owner { get; set; }

Public Overridable Property Owner As IExtensionBase
	Get
	Set

public:
virtual property IExtensionBase^ Owner {
	IExtensionBase^ get ();
	void set (IExtensionBase^ value);
}

abstract Owner : IExtensionBase with get, set
override Owner : IExtensionBase with get, set