c# - Update DataGrid to EF -

i display data datagrid in way:

var display = (from r in ve.folders.include("hosting_company1")                select new repoclass{ id = r.folder_id,name= r.full_name, hosname= r.hosting_company1.housing_name }).tolist();  dg1.itemssource = display; 

and in xaml:

<datagrid canuseraddrows="false" autogeneratecolumns="false" name="dg1">     <datagrid.columns>         <datagridtextcolumn binding="{binding path=id, mode=twoway}" header="id"/>         <datagridtextcolumn binding="{binding path=name, mode=twoway}" header="name" />         <datagridtextcolumn binding="{binding path=hosname, mode= twoway}"  header="company" />     </datagrid.columns> </datagrid> 

how update data ef?

if ve datacontext, need call ve.savechanges(). pass observable collection datagrid changes easier manage.