Display all related data in comma separated list sql server

Concetenate the two fields and display the records with comma separated string in one field.

SELECT p_scrid,
SUBSTRING(
(
SELECT (' ,' + screen_name)
FROM tbl_SCRMst t2
WHERE t1.p_scrid = t2.p_scrid
ORDER BY
p_scrid,
screen_name
FOR XML PATH( '')
),3,1000)
FROM tbl_SCRMst t1
GROUP BY p_scrid

Thanks & Regards
Santosh