public void SaveDocument(
    Stream stream
)

Public Sub SaveDocument(
    stream As Stream
)

using DevExpress.Docs.Presentation;

namespace PresentationApiSample;

public class Program {
    public static void Main(string[] _) {
        // Create a presentation
        Presentation presentation = new Presentation();
        //...
        // Populate the presentation with content
        //...
        // Save the modified presentation to a new PPTX file
        FileStream outputStream = new FileStream(@"D:\\resulting-presentation.pptx", FileMode.Create);
        presentation.SaveDocument(outputStream);
        outputStream.Dispose();
    }
}

Imports DevExpress.Docs.Presentation

Namespace PresentationApiSample

    Public Class Program
        Public Shared Sub Main(__ As String())

            ' Create a presentation
            Dim presentation As Presentation = New Presentation()
            '...
            ' Populate the presentation with content
            '...
            ' Save the modified presentation to a new PPTX file
            Dim outputStream As FileStream = New FileStream("D:\\resulting-presentation.pptx", FileMode.Create)
            presentation.SaveDocument(outputStream)
            outputStream.Dispose()

        End Sub
    End Class
End Namespace