How to concate the Coumn values with rows from datagridview

Question

 
  In Datagridview as follows
Student English Tamil Maths Science Social A 70 75 80 90 75 B 60 55 70 85 60 C 50 60 70 75 63


using foreach loop, from the above Datagridview i want as follows

A Englsih 70,Tamil 75,Maths 80,Science 90,Social 75 B Englsih 60,Tamil 55,Maths 70,Science 85,Social 60 C Englsih 50,Tamil 60,Maths 70,Science 75,Social 63

for the above output i want to get how to write the code in C3.
please help me.

Regards,
Rao.