Avoid insertion of duplicate images using asp.net fileupload

if (fup.HasFile)

        {

            string filename = Path.GetFileName(fup.FileName);

            string image1 = Server.MapPath("images/" + filename);

            if (File.Exists(image1))

            {

                File.Delete(image1);

            }

            fup.SaveAs(image1);

        }

How to delete files from folder

Code:

string[] files = Directory.GetFiles(Server. MapPath(“Foldername”);

foreach (string file in files)

{

    File.Delete(file);

}

Another way:

foreach (var file in Directory.GetFiles(Server.MapPath(“foldername”)))

{

       File.Delete(file);

}

Another way (Lambda Expression):

Array.ForEach(Directory.GetFiles(path), File.Delete);

To Check if the Folder contain any files:

if (Directory.GetFiles(Server.MapPath("Imagefolder"), "*.jpg").Any())

  {

  Array.ForEach(Directory.GetFiles(Server.MapPath("Imagefolder"), "*.jpg"),  File.Delete);

  }