FrameParent Property

This frame's parent frame. This can be null to signify that it has no parent (effectively meaning the scene is the parent). Note that setting the parent doesn't change the Location and Rotation properties, meaning that they will have the same values, but now be relative to the new parent. To reparent while maintaining the same world location and rotation, use the Reparent method.

public virtual Frame Parent { get; set; }