var textOfAnnot="ab cd ef gh...";
var freeTextWithoutAp = new PdfFreeTextAnnotation(page);
freeTextWithoutAp.BorderStyle = new Patagames.Pdf.Net.Wrappers.PdfBorderStyle();
freeTextWithoutAp.BorderStyle.Style = BorderStyles.Solid;
freeTextWithoutAp.BorderStyle.Width = 0.00f;
freeTextWithoutAp.BorderStyle.DashPattern = new float[] { 3, 3 };
freeTextWithoutAp.BorderEffect = new PdfBorderEffect();
freeTextWithoutAp.BorderEffect.Effect = BorderEffects.None;
freeTextWithoutAp.BorderEffect.Intensity = 0;
freeTextWithoutAp.Intent = AnnotationIntent.FreeTextTypeWriter;
freeTextWithoutAp.Color = FS_COLOR;
freeTextWithoutAp.Contents = textOfAnnot;
freeTextWithoutAp.DefaultAppearance = "/Calibri 5 Tf 0 0 0 rg";
freeTextWithoutAp.Opacity = 1.0f;
freeTextWithoutAp.Rectangle = new FS_RECTF(1*72, 3*72, 1*72+15, 2*72);
freeTextWithoutAp.Subject = "a";
freeTextWithoutAp.Text = "b";
freeTextWithoutAp.TextAlignment = JustifyTypes.Centered;
freeTextWithoutAp.RegenerateAppearances();

page.Annots.Add(freeTextWithoutAp);


The PdfFreeTextAnnotation created by the above code cannot be displayed in pdfview，But it can be displayed in the adobe reader。Please help me, thank you。