private static void SetImageSource(Image image)
{
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
var presentation = new PresentationDocument();
var slide = presentation.Slides.AddNew(SlideLayoutType.Custom);
var textBox = slide.Content.AddTextBox(ShapeGeometryType.Rectangle, 2, 2, 8, 4, LengthUnit.Centimeter);
textBox.Shape.Format.Outline.Fill.SetSolid(Color.FromName(ColorName.DarkGray));
var run = textBox.AddParagraph().AddRun("Hello World!");
run.Format.Fill.SetSolid(Color.FromName(ColorName.Black));
image.Source = presentation.ConvertToImageSource(SaveOptions.Image);
}