使用C#如何将图片下载到已发布的网站中？报不支持URI格式错误！

fileName给的网址是http://localhost:8060/imageCode/image/ ，然后报不支持URI格式，如果写E://imageCode//image就没有问题，但是我是想把他下载到http://localhost:8060/imageCode/image/ 这个网站的路径下，而不是我本地的路径
 public static bool SaveBinaryFile(WebResponse response, string FileName)
        {
            bool Value = true;
            byte[] buffer = new byte[1024];
            try
            {
                if (!Directory.Exists(FileName))
                {
                    Directory.CreateDirectory(FileName);
                }
                Stream outStream = System.IO.File.Create(FileName + "/imageCode.png");
                Stream inStream = response.GetResponseStream();
                int l;
                do
                {
                    l = inStream.Read(buffer, 0, buffer.Length);
                    if (l > 0)
                        outStream.Write(buffer, 0, l);
                }
                while (l > 0);
               
                outStream.Close();
                inStream.Close();
            }
            catch
            {
                Value = false;
            }
            return Value;
        }