try this

;WITH cte AS

(

SELECT DISTINCT ID

FROM @Sample

)

SELECT cte.ID, Z.Descriptions

FROM cte

CROSS APPLY

(

SELECT (STUFF((SELECT CHAR(13) + Description

FROM @Sample AS Sample

WHERE Sample.ID = cte.ID

FOR XML PATH(''), TYPE).value('.[1]', 'varchar(MAX)'), 1, 1, ''))

) AS Z (Descriptions)