LINQ Sort By Date

I want to order the period start date first for each employee. So 12/5/2015 should go before 12/12/2015. I want to do this using LINQ

TABLE TEMP

empno	project	task   	hrs	periodStart	periodEnd

 BBBB	red	       REG	       40	12/12/2015	12/18/2015 

BBBB	red	       PTO    	40	12/5/2015	12/11/2015 

CCCC	blue	REG	40	12/5/2015	12/11/2015 

CCCC	blue	REG	40	12/12/2015	12/18/2015 

DDDD	white	PTO  	40	12/12/2015	12/18/2015

 DDDD	white	REG	40	12/5/2015	12/11/2015