ImageGear .NET - Updated
CAD to PDF
User Guide > How to Work with... > CAD > How To ... > Convert ... > CAD to PDF

The CADtoPDF sample demonstrates this functionality. See Samples.

The following CADtoPDF sample illustrates how you can create a PDF page from a CAD page:

C#
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using System.IO;
using ImageGear.Formats;
using ImageGear.Formats.CAD;

public static void CadToPdf(string inFile, string outFile)
{
    ImGearCADPage page = null;

    // Load the file.
    using (FileStream fileStream = new FileStream(inFile, FileMode.Open, FileAccess.Read))
    {
        page = (ImGearCADPage)ImGearFileFormats.LoadPage(fileStream);
    }

    // Save the CAD file to a PDF file.
    using (FileStream fileStream = new FileStream(outFile, FileMode.Create, FileAccess.Write))
    {
        ImGearFileFormats.SavePage(page, fileStream, ImGearSavingFormats.PDF);
    }
}
VB.NET
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Imports System.IO
Imports ImageGear.Formats
Imports ImageGear.Formats.CAD

Public Sub CadToPdf(inPath As String, outPath As String)
    Dim page As ImGearCADPage

    ' Load the file.
    Using fileStream As New FileStream(inPath, FileMode.Open, FileAccess.Read)
        page = ImGearFileFormats.LoadPage(fileStream)
    End Using

    ' Save the CAD file as a PDF file
    Using fileStream As New FileStream(outPath, FileMode.Create, FileAccess.Write)
        ImGearFileFormats.SavePage(page, fileStream, ImGearSavingFormats.PDF)
    End Using
End Sub
The sample above uses the default saving options for PDF, but these can be changed by the user based on their needs. In order to change any of the saving options you need to set page.SavingOptions["PDFSaveOptions"] to a new CADPDFSaveOptions object that has the saving options you want.