DocumentDirection

public DocumentDirection DocumentDirection { get; set; }

// Create a "TxtLoadOptions" object, which we can pass to a document's constructor
// to modify how we load a plaintext document.
TxtLoadOptions loadOptions = new TxtLoadOptions();

// Set the "DocumentDirection" property to "DocumentDirection.Auto" automatically detects
// the direction of every paragraph of text that Aspose.Words loads from plaintext.
// Each paragraph's "Bidi" property will store its direction.
loadOptions.DocumentDirection = DocumentDirection.Auto;

// Detect Hebrew text as right-to-left.
Document doc = new Document(MyDir + "Hebrew text.txt", loadOptions);

Assert.True(doc.FirstSection.Body.FirstParagraph.ParagraphFormat.Bidi);

// Detect English text as right-to-left.
doc = new Document(MyDir + "English text.txt", loadOptions);

Assert.False(doc.FirstSection.Body.FirstParagraph.ParagraphFormat.Bidi);