C#

profilePictureBox.Dispose(); // When I use This After The Function Executed
                                 PictureBox Disappears But File Delete Successfully.
 try
                {
                    if (File.Exists(oldfilename))
                    {
                        File.Delete(oldfilename);
                        profilePicPictureBox.Load(picPath);
                    }
                    else
                    {
                        MessageBox.Show("File Not Found");
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                } 

System.IO.IOExecption:The Process cannot access the file 
'filepath' because it is being      used by another process.

X509Store test = new X509Store(StoreName.Root, StoreLocation.LocalMachine);
test.Open(OpenFlags.ReadOnly);

if (test.Certificates.Count > 0)
{
     foreach (X509Certificate2 cert in test.Certificates)
     {
          MessageBox.Show("Certificate: " + cert.ToString());
     }
}