How is custom resolution supported in Word document to image conversion in ASP.NET WebForms ?

     //Loads an existing Word document
    WordDocument wordDocument = new WordDocument("Template.docx", FormatType.Docx);
     //Converts word document to image
     Image[] images = wordDocument.RenderAsImages(ImageType.Bitmap);
    int imageIndex = 0;
    int customReslution = 500;
    int defaultImageResolution = 96;
    foreach (Image image in images)
     {
           //Create a bitmap of specific width(500) and height(500)
           Bitmap bitmap = new Bitmap((int)((image.Width * customReslution) / defaultImageResolution), (int)((image.Height * customReslution) / defaultImageResolution), PixelFormat.Format32bppPArgb);
           //Set the custom resolution (500)
           bitmap.SetResolution(customReslution, customReslution);
          //Get graphics from the custom size bitmap image
          Graphics graphics = Graphics.FromImage(bitmap);
           //Recreate the image from stream using specified width and height
           graphics.DrawImage(image, new Rectangle(0, 0, bitmap.Width, bitmap.Height));       
           //Save the bitmap
           bitmap.Save("WordToImage_" + imageIndex + ".png", ImageFormat.Png);
          imageIndex ++;
     }
   //Closes the document
   wordDocument.Close();

'Loads an existing Word document
 Dim wordDocument As New WordDocument("Template.docx", FormatType.Docx)
  'Converts word document to image
   Dim images As Drawing.Image() = wordDocument.RenderAsImages(ImageType.Bitmap)
   Dim imageIndex As Integer = 0
   Dim customResolution As Integer = 500
   Dim defaultImageResolution As Integer = 96
   For Each image As Drawing.Image In images
      'Create a bitmap of specific width(500) and height(500)
      Dim bitmap As New Bitmap(CInt((image.Width * customResolution) / defaultImageResolution), CInt((image.Height * customResolution) / defaultImageResolution), PixelFormat.Format32bppPArgb)
     'Set the custom resolution (500)
      bitmap.SetResolution(customResolution, customResolution)
     'Get graphics from the custom size bitmap image
      Dim graphics As Graphics = Graphics.FromImage(bitmap)
     'Recreate the image from stream using specified width and height
     graphics.DrawImage(image, New Rectangle(0, 0, bitmap.Width, bitmap.Height))
    'Save the bitmap 
     bitmap.Save("WordToImage_" + imageIndex.ToString() + ".png", ImageFormat.Png)
     imageIndex += 1
 Next
'Closes the document
wordDocument.Close()