Вставка изображения в колонтитул Word (interop)

var app = new Word.Application();
app.Visible = false;
var doc = app.Documents.Open(outputPath);
 
switch (position)
{
    case "topleft":
        app.ActiveWindow.ActivePane.View.SeekView = Word.WdSeekView.wdSeekFirstPageHeader;
        app.Selection.ParagraphFormat.Alignment = Word.WdParagraphAlignment.wdAlignParagraphLeft;
        break;
    case "topright":
        app.ActiveWindow.ActivePane.View.SeekView = Word.WdSeekView.wdSeekFirstPageHeader;
        app.Selection.ParagraphFormat.Alignment = Word.WdParagraphAlignment.wdAlignParagraphRight;
        break;
    case "botleft":
        app.ActiveWindow.ActivePane.View.SeekView = Word.WdSeekView.wdSeekFirstPageFooter;
        app.Selection.ParagraphFormat.Alignment = Word.WdParagraphAlignment.wdAlignParagraphLeft;
        break;
    case "botright":
        app.ActiveWindow.ActivePane.View.SeekView = Word.WdSeekView.wdSeekFirstPageFooter;
        app.Selection.ParagraphFormat.Alignment = Word.WdParagraphAlignment.wdAlignParagraphRight;
        break;
}
 
var headerImg = app.Selection.InlineShapes.AddPicture(imagePath);
headerImg.ScaleWidth = zoom;
headerImg.ScaleHeight = zoom;

var section = doc.Sections[1];
var footer = section.Footers[Word.WdHeaderFooterIndex.wdHeaderFooterFirstPage];
var footerShapes = footer.Range.InlineShapes;
 
var table = doc.Tables.Add(footer.Range, footerShapes.Count + 1, 1);
 
var shapeIndex = 1;
for (var i = 1; i <= footerShapes.Count; i++)
{
    shapeIndex++;
 
    var shape = footerShapes[i];
    var shapeType = footerShapes[i].Type;
    // ??? ...
}
 
var cell = table.Cell(shapeIndex, 1);
var iiimg = cell.Range.InlineShapes.AddPicture(imagePath);
iiimg.ScaleWidth = zoom;
iiimg.ScaleHeight = zoom;

Word.WdCollapseDirection.wdCollapseStart