FileInfo not deleting files from online server

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C#

ASP.NET

C#4.0

Respected EveryOne

I asked this question some days ago. but no such reply came that can solve my problem.
My code when i run on local system, deletes files from the local machine. when i run the same code online (Internet). Despite of read write access in the folder where i am deleting the file. it creates exception that the file is in use.
My code to delete that files are as under. The code is simple. I have references in the database to pictures in the directory.All the pictures in the directory are uploaded using the system. I have to get the references which i have to delete for both the thumbnail image and full images from the database and repose both of the references in list

protected void grdAllCars_RowDeleting(object sender, GridViewDeleteEventArgs e) 
{ 
var dataKey = grdAllCars.DataKeys[e.RowIndex];
 var companyId = Utilities.GetCompanyId(); 
if (dataKey != null && companyId != null)
 { 
decimal cId = Convert.ToDecimal(companyId); 
decimal CarId = Convert.ToDecimal(dataKey.Value.ToString());
 var objContext = new CarShowRoomEntities();
 var showRoomData = objContext.tbl_Cars.SingleOrDefault(car => (car.CarId == CarId && car.CompanyId == cId));
 var allImages = objContext.tbl_Car_Image.Where(image => image.CarId == CarId).ToList();
 var largeImagePaths = new List(); // Complete paths for all full images to be deleted
 var thmbImagePaths = new List(); // Complete paths for all thumbnail images to be deleted
 foreach (var img in allImages)
 { 
largeImagePaths.Add(img.CarImagePath);
 thmbImagePaths.Add(img.CarThmb_ImagePath);
 objContext.DeleteObject(img);
 } 
objContext.DeleteObject(showRoomData);
 objContext.SaveChanges();
 try 
{
 foreach (var thmbImagePath in thmbImagePaths) 
{ 
var fi = new FileInfo(Server.MapPath(thmbImagePath));
 if (fi.Exists)
 { 
fi.Delete();
 }
 } 
foreach (var largeImagePath in largeImagePaths)
 { 
var fi = new FileInfo(Server.MapPath(largeImagePath));
 if (fi.Exists)
 { fi.Delete();
 } 
} 
} 
catch { } 
if (ViewState["SearchQuery"] != null) PopulateGridViewBasedOnQuery(ViewState["SearchQuery"].ToString()); else PopulateGridViewBasedOnQuery(); } }

So kindly if any solution available, kindly guide me.



Regards
TanzeelurRehman