EntityFramework update or insert Chinese or non-English text

[schwub]

Actually before i did not use framework or linq, just type in sql statement with Sqlcommand class, i type in \[code\]insert into table values(N'sample')\[/code\]actually i donot know what is N, but it works for Chinese and other Language, otherwise, it will insert some question mark.But when i use EntityFramework,this kind of framework always insert some question mark, can i ask how to tackle the issue