Opening Windows Image Viewer programmatically - C#.NET

Below Code open windows defalut Image and photo viewer from .Net

public void OpenImageFile(string FilePath)
{
Process objProcess = new Process();
objProcess.StartInfo.FileName = “rundll32.exe”;
objProcess.StartInfo.UseShellExecute = false;
objProcess.StartInfo.Arguments = ” shimgvw.dll ImageView_Fullscreen ” + FilePath;
objProcess.Start();
objProcess.WaitForExit();
objProcess.Close();
}