Using jsreport .net client api to convert pure html into pdf stream.

convert_html_to_pdf_stream_jsreport.cs

public static async Task GetBackPdfStreamFromPureHtml()
{
    var reportingService = new ReportingService("http://localhost:2000");
    var report = await reportingService.RenderAsync(new RenderRequest()
    {
        template = new Template()
        {
            content = "<h1>pure html</h1",
            recipe = "phantom-pdf",
            engine = "handlebars"
        }
    });

    using (var reader = new StreamReader(report.Content))
    {
        var pdf = reader.ReadToEnd();
        Assert.IsTrue(pdf.StartsWith("%PDF"));
    }
}