Text Box Formatting in PowerPoint files

using GemBox.Presentation;

class Program
{
    static void Main()
    {
        // If using the Professional version, put your serial key below.
        ComponentInfo.SetLicense("FREE-LIMITED-KEY");

        var presentation = new PresentationDocument();

        // Create new slide.
        var slide = presentation.Slides.AddNew(SlideLayoutType.Custom);

        // Create new text box.
        var textBox = slide.Content.AddTextBox(
            ShapeGeometryType.RoundedRectangle, 2, 2, 10, 10, LengthUnit.Centimeter);

        // Set shape format.
        textBox.Shape.Format.Fill.SetSolid(Color.FromName(ColorName.LightGray));
        textBox.Shape.Format.Outline.Fill.SetSolid(Color.FromName(ColorName.DarkGray));
        textBox.Shape.Format.Outline.Width = Length.From(1, LengthUnit.Point);

        // Set text box text.
        textBox.AddParagraph().AddRun("Shows some of the text box formatting options available in GemBox.Presentation component.");

        // Get text box format.
        var format = textBox.Format;

        // Set vertical alignment of the text.
        format.VerticalAlignment = VerticalAlignment.Middle;

        // Set left and top margin.
        format.InternalMarginLeft = Length.From(1, LengthUnit.Centimeter);
        format.InternalMarginTop = Length.From(1, LengthUnit.Centimeter);

        // Set text direction.
        format.TextDirection = TextDirection.Rotate270;

        // Wrap text in shape.
        format.WrapText = true;

        presentation.Save("Text Box Formatting.%OutputFileType%");
    }
}