A double click on a TextBlock with TextBlock.editable property set to true will start in-place editing.
A single click on a TextBlock with TextBlock.editable property set to true will start in-place editing.
A single click on a TextBlock with TextBlock.editable property set to true will start in-place editing, but only if the Part that the TextBlock is in is already selected.
This enumeration specifies possible values for TextEditingTool.starting.
since3.0