Method to Process Exception For Entity

 /// <summary>
        ///
        /// </summary>
        /// <param name="exception"></param>
        /// <returns></returns>
        public static Exception ProcessServerException(string className, string methodName, Exception exception)
        {
            // Gets or sets update exception
            UpdateException updateException;

            // Checking Exception message ends with gti exception token (GTI_EXCEPTION)
            if (exception.Message.EndsWith(ERPUtilityResources.GTIExceptionWithToken) == false)
            {
                // Checking Exception is sql exception
                SqlException sqlException = exception.InnerException as SqlException;
                if (sqlException != null)
                {
                    // Returns a new exception to service class with class name - method name - sql exception exception with corresponding exception number as exception message
                    return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.SqlException + sqlException.Number.ToString() + ERPUtilityResources.GTIExceptionDetailsWithToken + sqlException.Message + ERPUtilityResources.GTIExceptionWithToken);
                }
                else
                {
                    // Checking Exception is optimistic concurrency exception
                    OptimisticConcurrencyException concurrencyException = exception.InnerException as OptimisticConcurrencyException;
                    if (concurrencyException != null)
                    {
                        // Returns a new exception to service class with class name - method name - concurrency exception with corresponding exception number as exception message
                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.OptimisticConcurrencyException + concurrencyException.GetHashCode().ToString() + ERPUtilityResources.GTIExceptionDetailsWithToken + concurrencyException.Message + ERPUtilityResources.GTIExceptionWithToken);
                    }
                    else
                    {
                        // Checking Exception is argument null exception
                        ArgumentNullException argException = exception as ArgumentNullException;
                        if (argException != null)
                        {
                            // Returns a new exception to service class with class name - method name - argument null exception with default exception number as exception message
                            return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.ArgumentNullException + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + argException.Message + ERPUtilityResources.GTIExceptionWithToken);
                        }
                        else
                        {
                            // Checking Exception is optimistic concurrency exception (concurrency exception from manager class)
                            concurrencyException = exception as OptimisticConcurrencyException;

                            if (concurrencyException != null)
                            {
                                // Returns a new exception to service class with class name - method name - concurrency exception with default exception number as exception message
                                return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.OptimisticConcurrencyException + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + concurrencyException.Message + ERPUtilityResources.GTIExceptionWithToken);
                            }
                            else
                            {
                                // Checking Exception is update exception (record already exists exception from manager class.thrown from manager class with page requirments)
                                updateException = exception as UpdateException;

                                if (updateException != null)
                                {
                                    if (updateException.Message.Equals(ERPUtilityResources.DateRangeException))
                                    {
                                        // Returns a new exception to service class with class name - method name - record already exists exception with default exception number as exception message
                                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.DateRangeException + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + updateException.Message + ERPUtilityResources.GTIExceptionWithToken);
                                    }
                                    else if (updateException.Message.Equals(ERPUtilityResources.OutofStockException))
                                    {
                                        // Returns a new exception to service class with class name - method name - out of stock exception with default exception number as exception message
                                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.OutofStockException + ERPUtilityResources.ExceptionToken + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + updateException.Message + ERPUtilityResources.GTIExceptionWithToken);
                                    }
                                    else if (updateException.Message.Equals(ERPUtilityResources.FromToRangeException))
                                    {
                                        // Returns a new exception to service class with class name - method name - out of stock exception with default exception number as exception message
                                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.FromToRangeException + ERPUtilityResources.ExceptionToken + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + updateException.Message + ERPUtilityResources.GTIExceptionWithToken);
                                    }
                                    else if (updateException.Message.Equals(ERPUtilityResources.ItemExistException))
                                    {
                                        // Returns a new exception to service class with class name - method name - out of stock exception with default exception number as exception message
                                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.ItemExistException + ERPUtilityResources.ExceptionToken + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + updateException.Message + ERPUtilityResources.GTIExceptionWithToken);
                                    }
                                    else if (updateException.Message.Equals(ERPUtilityResources.NoItemException))
                                    {
                                        // Returns a new exception to service class with class name - method name - out of stock exception with default exception number as exception message
                                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.NoItemException + ERPUtilityResources.ExceptionToken + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + updateException.Message + ERPUtilityResources.GTIExceptionWithToken);
                                    }
                                    else if (updateException.Message.Equals(ERPUtilityResources.ManyItemException))
                                    {
                                        // Returns a new exception to service class with class name - method name - out of stock exception with default exception number as exception message
                                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.ManyItemException + ERPUtilityResources.ExceptionToken + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + updateException.Message + ERPUtilityResources.GTIExceptionWithToken);
                                    }
                                    else if (updateException.Message.Equals(ERPUtilityResources.ActivityAircraftException))
                                    {
                                        // Returns a new exception to service class with class name - method name - out of stock exception with default exception number as exception message
                                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.ActivityAircraftException + ERPUtilityResources.ExceptionToken + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + updateException.Message + ERPUtilityResources.GTIExceptionWithToken);
                                    }
                                    else if (updateException.Message.Equals(ERPUtilityResources.ShiftAttendanceExistException))
                                    {
                                        // Returns a new exception to service class with class name - method name - out of stock exception with default exception number as exception message
                                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.ShiftAttendanceExistException + ERPUtilityResources.ExceptionToken + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + updateException.Message + ERPUtilityResources.GTIExceptionWithToken);
                                    }
                                    else
                                    {
                                        // Returns a new exception to service class with class name - method name - record already exists exception with default exception number as exception message
                                        return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.RecordAlreadyExistsException + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + updateException.Message + ERPUtilityResources.GTIExceptionWithToken);
                                    }
                                }
                                else
                                {
                                    // Returns a new exception to service class with class name - method name - unknown error with default exception number as exception message
                                    return new Exception(className + ERPUtilityResources.ExceptionToken + methodName + ERPUtilityResources.ExceptionToken + ERPUtilityResources.UnknownError + ERPUtilityResources.DefaultErrorNumber + ERPUtilityResources.GTIExceptionDetailsWithToken + exception.Message + ERPUtilityResources.GTIExceptionWithToken);
                                }
                            }
                        }
                    }
                }
            }
            else
            {
                return exception;
            }
        }