For HTML2PDF and XML2PDF solution check our PDFDoc Scout ActiveX library instead

using System;
using System.Collections.Generic;
using System.Text;
using Bytescout.PDF;
using System.Diagnostics;

namespace HelloWorld
{
class Program
{
static void Main(string[] args)
{
// Create main PDF Doc Engine
PDFDocEngine engine = new PDFDocEngine("", "");

// Add new document
Document document = engine.AddDocument();

// Append new page to the document
Page page = document.AddPage(PageSizeType.A3, PageOrientationType.LandScape);

// Create new drawing
Drawing drawing = page.AddDrawing();

// Line width
const double lineWidth = 5.0f;

// Set Line Width
drawing.SetLineWidth(lineWidth);

// Create red color
Color color = Drawing.RGBToColor(255, 0, 0);

// Set fill color
drawing.SetFillColor(color);

// X coordinate of circle
double pointX = 500.0f;
// Y coordinate of circle
double pointY = 500.0f;
// Radius of circle
double radius = 200.0f;

// Draw circle
drawing.Circle(pointX, pointY, radius);

// Fill and stroke circle
drawing.FillAndStroke();

// Closing drawing on the page
drawing.Close();

// Save document
document.Save("Circle.pdf");

// open generated PDF document in default PDF viewer installed in Windows
Process.Start("Circle.pdf");
}
}
}

Download example source code: bytescoutpdf_circle.zip (10 KB)

For HTML2PDF and XML2PDF solution check our PDFDoc Scout ActiveX library instead