IsInMegabytes

public bool IsInMegabytes { get; set; }

Document doc = new Document(MyDir + "Document.docx");

Assert.AreEqual(18105, doc.BuiltInDocumentProperties.Bytes);

DocumentBuilder builder = new DocumentBuilder(doc);
builder.MoveToDocumentEnd();
builder.InsertParagraph();

// Below are three different units of measure
// with which FILESIZE fields can display the document's file size.
// 1 -  Bytes:
FieldFileSize field = (FieldFileSize)builder.InsertField(FieldType.FieldFileSize, true);
field.Update();

Assert.AreEqual(" FILESIZE ", field.GetFieldCode());
Assert.AreEqual("18105", field.Result);

// 2 -  Kilobytes:
builder.InsertParagraph();
field = (FieldFileSize)builder.InsertField(FieldType.FieldFileSize, true);
field.IsInKilobytes = true;
field.Update();

Assert.AreEqual(" FILESIZE  \\k", field.GetFieldCode());
Assert.AreEqual("18", field.Result);

// 3 -  Megabytes:
builder.InsertParagraph();
field = (FieldFileSize)builder.InsertField(FieldType.FieldFileSize, true);
field.IsInMegabytes = true;
field.Update();

Assert.AreEqual(" FILESIZE  \\m", field.GetFieldCode());
Assert.AreEqual("0", field.Result);

// To update the values of these fields while editing in Microsoft Word,
// we must first save the changes, and then manually update these fields.
doc.Save(ArtifactsDir + "Field.FILESIZE.docx");