how to remove row in string function

Question

i am using multiline text box control .i want to store first 7 lines.remaining rows are removed string convertion .how to remove morethan one lines using string function.

90,00,000
Pallikaranai
3BHK
Unfurnished
1617
Builder
919884074768   
SISDanubewillalwayshaveaspecial'territorialindependence'.
Thenaturalvaluesandlandsaretherealsightsforthepeoplewholongforaquietliving.
Blessedwithabundantwater,SISDanubeoffersaspecialambienceforthosewhowanttoenjoythefeelingoffreedom.
ThisdelightfulapartmentwithlovelypanoramicviewissituatedonVelachery–TambaramRoadnexttoasmallandpeacefulhamlet-Pallikaranai.