Convert PDF to PNG image in C# and Visual Basic .NET with PDF Renderer SDK

using System;
 
using Bytescout.PDFRenderer;
 
 
namespace PDF2PNG
{
	class Program
	{
		static void Main(string[] args)
		{
			// Create an instance of Bytescout.PDFRenderer.RasterRenderer object and register it.
			RasterRenderer renderer = new RasterRenderer();
			renderer.RegistrationName = "demo";
			renderer.RegistrationKey = "demo";
 
			// Load PDF document.
			renderer.LoadDocumentFromFile("multipage.pdf");
 
			for (int i = 0; i < renderer.GetPageCount(); i++)
			{
				// Render first page of the document to PNG image file.
				renderer.RenderPageToFile(i, RasterOutputFormat.PNG, "image" + i + ".png");
			}
 
			// Open the first output file in default image viewer.
			System.Diagnostics.Process.Start("image0.png");
		}
	}
}

Imports Bytescout.PDFRenderer
 
 
Class Program
	Friend Shared Sub Main(args As String())
 
        ' Create an instance of Bytescout.PDFRenderer.RasterRenderer object and register it.
		Dim renderer As New RasterRenderer()
		renderer.RegistrationName = "demo"
		renderer.RegistrationKey = "demo"
 
		' Load PDF document.
		renderer.LoadDocumentFromFile("multipage.pdf")
 
		For i As Integer = 0 To renderer.GetPageCount() - 1
			' Render first page of the document to PNG image file.
			renderer.RenderPageToFile(i, RasterOutputFormat.PNG, "image" & i & ".png")
		Next
 
		' Open the first output file in default image viewer.
		System.Diagnostics.Process.Start("image0.png")
	End Sub
End Class