How to extract images from ASP.NET Core PDF?

using Syncfusion.Pdf;
using Syncfusion.Pdf.Parsing;
using Syncfusion.Pdf.Exporting;

Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Parsing
Imports Syncfusion.Pdf.Exporting

@{Html.BeginForm("ExtractImages", "Home", FormMethod.Get);
    {
        <div>
            <input type="submit" value="Create Document" style="width:150px;height:27px" />
        </div>
    }
    Html.EndForm();
}

//Load the PDF document 
string path = _hostingEnvironment.WebRootPath + "/Data/Essential_Pdf.pdf";
Stream stream = new FileStream(path, FileMode.Open);
PdfLoadedDocument loadedDocument = new PdfLoadedDocument(stream); 
 
for (int i = 0; i < loadedDocument.Pages.Count; i++)
{    
    //Get the page 
    PdfLoadedPage page = loadedDocument.Pages[i] as PdfLoadedPage;
 
    //Extract images 
    Stream[] images = page.ExtractImages();
 
    for(int j=0;j<images.Length;j++)
    {     
        //Save the image to local file
        FileStream outStream = System.IO.File.OpenWrite("Test"+i.ToString()+".png");
        images[0].CopyTo(outStream);
        outStream.Flush();   
    }        
}
 
//Dispose the stream 
stream.Dispose();

'Load the PDF document 
 Dim path As String = _hostingEnvironment.WebRootPath & "/Data/Essential_Pdf.pdf"
 Dim stream As Stream = New FileStream(path, FileMode.Open)
 Dim loadedDocument As PdfLoadedDocument = New PdfLoadedDocument(stream)
 
 For i As Integer = 0 To loadedDocument.Pages.Count - 1
    
     'Get the page 
     Dim page As PdfLoadedPage = TryCast(loadedDocument.Pages(i), PdfLoadedPage)
     'Extract images 
     Dim images As Stream() = page.ExtractImages()
 
     For j As Integer = 0 To images.Length - 1
         
         'Save the image to local file      
         Dim outStream As FileStream = System.IO.File.OpenWrite("Test" & i.ToString() & ".png")
         images(0).CopyTo(outStream)
         outStream.Flush()
         
     Next
 Next
 'Dispose the stream 
 stream.Dispose()