Backup LocalDB using C#

Hi,

    I have written an application and in the application there is an option to backup a localDb database to the users "MyDocuments" directory.

Unfortunately I am having issues with the backup as it keeps failing during execution, here is some of my code;

Backup Code:

        private void CreateBackup(string database)
        {
            try
            {
                string appPath = Application.StartupPath;

                // Set backup folder
                var backupFolder = string.Format("{0}\\", Environment.GetFolderPath(Environment.SpecialFolder.Windows));
                var moveFileFolder = string.Format("{0}\\", Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments));
                backupFolder += string.Format("{0}", "Temp\\");
                var sqlConStrBuilder = new SqlConnectionStringBuilder(ConnString);

                // set backupfilename
                var backupFileName = String.Format("{0}{1}_{2}.bak", backupFolder, "WorkTracker", DateTime.Now.ToString("yyyyMMdd"));
                var moveFileName = String.Format("{0}{1}_{2}.bak", moveFileFolder, "WorkTracker", DateTime.Now.ToString("yyyyMMdd"));

                using (var connection = new SqlConnection(sqlConStrBuilder.ConnectionString))
                {
                    var dbLoc = string.Format("{0}\\AppData\\WorkTracker.mdf", appPath);
                    var query = String.Format("BACKUP DATABASE {0} TO DISK='{1}'", dbLoc, backupFileName);
                    using (var command = new SqlCommand(query, connection))
                    {
                        connection.Open();
                        command.ExecuteNonQuery();
                    }

                    if (File.Exists(moveFileName))
                    {
                        File.Delete(moveFileName);

                        // Move the file.
                        File.Move(backupFileName, moveFileName);
                        meBackupResults.Text += string.Format("Backup Completed: {0}", moveFileName);
                    }
                    else
                    {
                        // Move the file.
                        File.Move(backupFileName, moveFileName);
                        meBackupResults.Text += string.Format("Backup Completed: {0}", moveFileName);
                    }
                }
            }
            catch (Exception ex)
            {
                meBackupResults.Text += string.Format("Backup failure: {0}{1}{2}", ex.Message, Environment.NewLine, ex.StackTrace);
            }

        }
    }

Connection String: (Using dbBackup)

<connectionStrings><add name="WorkTracker" connectionString="XpoProvider=MSSqlServer;Data Source=(LocalDB)\V11.0;AttachDbFilename=\AppData\WorkTracker.mdf;Integrated Security=True"/><add name="dbBackup" connectionString="Data Source=(LocalDB)\V11.0;AttachDbFilename=\AppData\WorkTracker.mdf;Integrated Security=True" /></connectionStrings>

The error message I get is:

Backup failure: An attempt to attach an auto-named database for file \AppData\WorkTracker.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

Any help would be greatly appreciated.

Regards..

Peter.