For Windows Store and universal apps,
TextBox supports two nifty features that are available by setting a corresponding Boolean property to
IsSpellCheckEnabled—Places red squiggles under misspelled words and provides a context menu with suggestions and other options. It also autocorrects common mistakes.
IsTextPredictionEnabled—Suggests a word while you type. This is
true by default, but it is activated only when input is coming from the software keyboard. (The theory is that it would be more of a distraction ...