html - linking two css classes in asp.net -

i new css styles , html.i have css file called layout.css in have class called

.grid {     width:100%;      direction:rtl } .tblsmonth {     direction :rtl } 

i have created css file class below:

.textdirection {direction:ltr} 

can make .grid , .tblsmonth direction property read css file .textdirection

as far know, can't combine them in css, can in html:

direction.css

.textdirection {direction:ltr} 

layout.css

.grid {     width:100%;  } .tblsmonth { } 

html

<div class"grid textdirection"></div>