Конвертируйте PDF в PNG в .NET SDK

    public static void ConvertPdfToPng()
    {
        const string localImageFileName = @"C:\Samples\sample.pdf";
        const string storageImageFileName = "sample.pdf";
        const string resultFileName = "sample.png";

        // Get your AppSid and AppSecret https://dashboard.aspose.cloud (free registration required).
        var pdfApi = new PdfApi(AppSecret, AppSid);
        using var file = File.OpenRead(localImageFileName);
        pdfApi.UploadFile(storageImageFileName, file);

        var response = pdfApi.GetPageConvertToPng(storageImageFileName, 1);
        response.CopyTo(File.OpenWrite(resultFileName));
        Console.WriteLine($"PDF to PNG result: {response.Length} bytes");
    }