How to get information about annotations of TIFF file?

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Here is C#/VB.NET code that shows how get information about annotations of TIFF file:

// create image collection
Vintasoft.Imaging.ImageCollection images = new Vintasoft.Imaging.ImageCollection();
// create annotation controller associated with image collection
Vintasoft.Imaging.Annotation.AnnotationDataController annotations = 
    new Vintasoft.Imaging.Annotation.AnnotationDataController(images);
// load TIFF file into collection
images.Add("multipage.tif");

// for each page of TIFF file
for (int page = 0; page < images.Count; page++)
{
    System.Windows.Forms.MessageBox.Show("Page " + page.ToString());
    // get annotation collection associated with page of TIFF file
    Vintasoft.Imaging.Annotation.AnnotationDataCollection currentAnnotations = annotations[page];
    // get information about annotations
    for (int anno = 0; anno < currentAnnotations.Count; anno++)
    {
        System.Windows.Forms.MessageBox.Show("Annotation " + anno.ToString() +
                        ", Type = " + currentAnnotations[anno].GetType().ToString());
    }
}

VB.NET

' create image collection
Dim images As New Vintasoft.Imaging.ImageCollection()
' create annotation controller associated with image collection
Dim annotations As New Vintasoft.Imaging.Annotation.AnnotationDataController(images)
' load TIFF file into collection
images.Add("multipage.tif")

' for each page of TIFF file
For page As Integer = 0 To images.Count - 1
    System.Windows.Forms.MessageBox.Show("Page " & page.ToString())
    ' get annotation collection associated with page of TIFF file
    Dim currentAnnotations As Vintasoft.Imaging.Annotation.AnnotationDataCollection = annotations(page)
    ' get information about annotations
    For anno As Integer = 0 To currentAnnotations.Count - 1
        System.Windows.Forms.MessageBox.Show("Annotation " & anno.ToString() & ", Type = " & currentAnnotations(anno).[GetType]().ToString())
    Next
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