Printing the PowerPoint presentation with Essential Presentation library

//Opens a PowerPoint presentation
IPresentation presentation = Presentation.Open("Sample.pptx");
//Converts the slides to images
Image[] images = presentation.RenderAsImages(Syncfusion.Drawing.ImageType.Bitmap);
//Closes the PowerPoint presentation
presentation.Close();

//Initializes the start and end page for printing
int startPageIndex = 1;
int endPageIndex = images.Length;
//Creates new PrintDialog instance.
System.Windows.Forms.PrintDialog printDialog = new System.Windows.Forms.PrintDialog();
//Sets new PrintDocument instance to print dialog.
printDialog.Document = new PrintDocument();
//Enables the print current page option.
printDialog.AllowCurrentPage = true;
//Enables the print selected pages option.
printDialog.AllowSomePages = true;
//Sets the start and end page index
printDialog.PrinterSettings.FromPage = 1;
printDialog.PrinterSettings.ToPage = images.Length;
//Opens the print dialog box.
if (printDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
//Checks whether the selected page range is valid or not
if (printDialog.PrinterSettings.FromPage > 0 && printDialog.PrinterSettings.ToPage <= images.Length)
{
//Updates the start page of the document to print.
startPageIndex = printDialog.PrinterSettings.FromPage - 1;
//Updates the end page of the document to print.
endPageIndex = printDialog.PrinterSettings.ToPage;
//Hooks the PrintPage event to handle be drawing pages for printing.
printDialog.Document.PrintPage += new PrintPageEventHandler(PrintPageMethod);
//Prints the document.
printDialog.Document.Print();
}
}
 
private void PrintPageMethod(object sender, PrintPageEventArgs e)
{
//Gets the print start page width.
int currentPageWidth = images[startPageIndex].Width;
//Gets the print start page height.
int currentPageHeight = images[startPageIndex].Height;
//Gets the visible bounds width for print.
int visibleClipBoundsWidth = (int)e.Graphics.VisibleClipBounds.Width;
//Gets the visible bounds height for print.
int visibleClipBoundsHeight = (int)e.Graphics.VisibleClipBounds.Height;
//Checks whether the page layout is landscape or portrait.
if (currentPageWidth > currentPageHeight)
{
//Translates the position.
e.Graphics.TranslateTransform(0, visibleClipBoundsHeight);
//Rotates the object at 270 degrees
e.Graphics.RotateTransform(270.0f);
//Draws the current page image.
e.Graphics.DrawImage(images[startPageIndex], new System.Drawing.Rectangle(0, 0, currentPageWidth, currentPageHeight));
}
else
{
//Draws the current page image.
e.Graphics.DrawImage(images[startPageIndex], new System.Drawing.Rectangle(0, 0, visibleClipBoundsWidth, visibleClipBoundsHeight));
}
//Disposes the current page image after drawing.
images[startPageIndex].Dispose();
//Increments the start page index.
startPageIndex++;
//Updates whether the document contains more pages to print or not.
if (startPageIndex < endPageIndex)
e.HasMorePages = true;
else
startPageIndex = 0;
}