public virtual T Get(Func <T, bool> predicate)
        {
            T entity = null;

            AppLogger.logDebug(this.ToString(), string.Format("Begin getting entity of {0}.", typeof(T)));
            try
            {
                if (predicate != null)
                {
                    entity = EntitiesSet.FirstOrDefault(predicate);
                    if (entity != null)
                    {
                        AppLogger.logDebug(this.ToString(), string.Format("Entity of {0} found.", typeof(T)));
                        AppLogger.logDebug(this.ToString(), "GET", entity);
                        EntitiesSet.Detach(entity);
                    }
                    else
                    {
                        AppLogger.logDebug(this.ToString(), string.Format("Entity of {0} not found.", typeof(T)));
                    }
                }
            }
            catch (Exception ex)
            {
                AppLogger.logError(this.ToString(), ex);
                throw;
            }
            AppLogger.logDebug(this.ToString(), string.Format("Finish getting entity of {0}.", typeof(T)));
            return(entity);
        }