Amazon S3 Download File with Prompt

gistfile1.cs

public static void DownloadObject(string keyName)
{
    string[] keySplit = keyName.Split('/');
    string fileName = keySplit[keySplit.Length - 1];
    string dest = Path.Combine(HttpRuntime.CodegenDir, fileName);
    
    using (client = Amazon.AWSClientFactory.CreateAmazonS3Client())
    {
        GetObjectRequest request = new GetObjectRequest().WithBucketName(bucketName).WithKey(keyName);
        
        using (GetObjectResponse response = client.GetObject(request))
        {
           response.WriteResponseStreamToFile(dest, false);                              
        }
        
        HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.AppendHeader("content-disposition", "attachment; filename=" + fileName);
        HttpContext.Current.Response.ContentType = "application/octet-stream";
        HttpContext.Current.Response.TransmitFile(dest);
        HttpContext.Current.Response.Flush();
        HttpContext.Current.Response.End();
        
        // Clean up temporary file.
        System.IO.File.Delete(dest);
    }
}