The UndoScope method in the Editor.SceneEditorSession class is used to create a scope for undo operations within a scene editing session. This method returns an ISceneUndoScope object, which represents a context for grouping undoable actions. This is particularly useful for ensuring that a series of changes can be undone as a single operation, enhancing the user experience by providing a more intuitive undo/redo functionality.

To use the UndoScope method, call it with a descriptive name for the undo operation. This name will be used to identify the operation in the undo stack. The method returns an ISceneUndoScope object, which should be disposed of after the operations are complete to finalize the undo scope.

Example usage:

using (var undoScope = sceneEditorSession.UndoScope("Move Objects"))
{
    // Perform operations that should be grouped into a single undo action
    // e.g., moving multiple objects in the scene
}

Ensure that the using statement is used to automatically dispose of the ISceneUndoScope object, which will commit the changes to the undo system.