the process cannot access the file because it is being used by another process

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C#

ASP.NET

I'm working in ASP.NET application. when I try to change the profile picture (by using "Edit" function) I get the error: "The process cannot access the file 'C:\WebSite\sitename\ProviderImages\77ab2-e.png' because it is being used by another process.". I cannot Change the profile picture file . My code is following:





Thanks.............

if (FileUpload1.HasFile)
                        {
                            System.Drawing.Image UploadedImage = System.Drawing.Image.FromStream(FileUpload1.PostedFile.InputStream);
                            if (UploadedImage.Width < 100 || UploadedImage.Height < 150)
                            {
                                string filename = Guid.NewGuid().ToString().Substring(0, 10);
                                string extension = FileUpload1.PostedFile.FileName.Remove(0, FileUpload1.PostedFile.FileName.LastIndexOf("."));
                                FileUpload1.SaveAs(Server.MapPath(Request.ApplicationPath) + "/ProviderImages/" + (filename + extension));
                                string path = Server.MapPath(Request.ApplicationPath) + "/ProviderImages/" + (filename + extension);
                                string path1 = Server.MapPath(Request.ApplicationPath) + "/ProviderImages/" + ("tmp" + filename + extension);
                                
if (ThumbNailGenerator.GenerateThumbNail(path, path1) == true)

                                {


if (HiddenField1.Value != null)
                                   {
                                       if (File.Exists(Server.MapPath(Request.ApplicationPath + "/ProviderImages/" + HiddenField1.Value)))
                                       {
                                           File.Delete(Server.MapPath(Request.ApplicationPath + "/ProviderImages/" + HiddenField1.Value));

                                           if (File.Exists(Server.MapPath(Request.ApplicationPath + "/ProviderImages/" + "tmp" + HiddenField1.Value)))
                                           {
                                               File.Delete(Server.MapPath(Request.ApplicationPath + "/ProviderImages/" + "tmp" + HiddenField1.Value));
                                           }
                                       }

                                   }

                                   updateproviderrequest.Provider.Company.CompanyLogo = filename + extension;
                                   FileUpload1.FileContent.Dispose();

                                   updateproviderresponse = providerservice.Update(updateproviderrequest);
                               }
                           }
                           else
                           {
                               lblmessage.Text = "";
                               lblmessage.Text = "Upload image lessthan 100*150 size";
                               return;

                           }
                       }
                       else if (FileUpload1.HasFile == false)
                       {
                           updateproviderrequest.Provider.Company.CompanyLogo = string.Empty;
                           updateproviderresponse = providerservice.Update(updateproviderrequest);
                       }
                       else
                       {
                           getEmployeeRequest.UserId = (Guid)Session["UserId"];
                           getEmployeeRequest.CompanyName = txtcompanyname.Text;
                           getEmployeeResponse = EmplyeeService.Get(getEmployeeRequest);
                           if (getEmployeeResponse.AlreadyEmailErrorMessages.Count > 0)
                           {
                               lblcommsg.Text = "CompanyName Exist..Please Enter again";
                               lblmessage.Text = string.Empty;
                               return;
}