many thanks to Ognjen. I've tried

use Illuminate\Database\Schema\Builder;

but the solution is just

use Schema;

Brother Ognjen,

I shall give up my throne to you if i had one! Thank you very much for this solution i tried the same thing what hansnataniel tried, But i was not getting that class not foud error instead i got some stupid Fatal Error which gave me no proper idea

Uncaught TypeError: Argument 1 passed to App\Exceptions\Handler::report() must be an instance of Exception, instance of Error given, called in /var/www/html/edu-lara-5/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php on line 73 and defined in /var/www/html/edu-lara-5/app/Exceptions/Handler.php:25 Stack trace: #0 /var/www/html/edu-lara-5/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php(73): App\Exceptions\Handler->report(Object(Error)) #1 [internal function]: Illuminate\Foundation\Bootstrap\HandleExceptions->handleException(Object(Error)) #2 {main} thrown