Win Web Hosting

use following code for it
if (FileUpload1.PostedFile != null)
{
ImageName = FileUpload1.PostedFile.FileName;
FileUpload1.SaveAs(Server.MapPath(“Images/”) + ImageName);

string ThumbnailPath = (Server.MapPath(“ThumbnailImages/”) + ImageName);
System.Drawing.Image.GetThumbnailImageAbort myCallback =
new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);

using(System.Drawing.Image TargetImage =
System.Drawing.Image.FromFile(Server.MapPath(“Images/”) + ImageName))
{
using (System.Drawing.Image Thumbnail =
TargetImage.GetThumbnailImage(100, 200, myCallback, IntPtr.Zero))
{
Thumbnail.Save(Server.MapPath(“ThumbnailImages/th_”) + ImageName);
Thumbnail.Dispose();
}
TargetImage.Dispose();
}