SizeSearchCriteria

public class SizeSearchCriteria : SearchCriteria

using (Watermarker watermarker = new Watermarker(@"C:\test.some_ext"))
{
    SizeSearchCriteria widthRange = new SizeSearchCriteria(Dimension.Width, 50, 100);
    RotateAngleSearchCriteria rotateAngle = new RotateAngleSearchCriteria(0, 45);
    TextSearchCriteria textCriteria = new TextSearchCriteria(new Regex("^Test watermark$"));
    PossibleWatermarkCollection watermarks = watermarker.Search(textCriteria.And(widthRange.Or(rotateAngle)));
    watermarks.Clear();
    watermarker.Save();
}