I have to save and read xml file in one column linq database

I have linq database table with 3 columns one use for stored xml file
CREATE TABLE dbo.Txml(
brRacuna int NULL,
korisnickoime varchar(50) NULL,
xmldata xml NULL
)

I need to write xml file into column xmldata and aslo read data from this column using linq query 

I need realy help thanks in advance