public IRepository <T> Update(T obj, params Expression <Func <T, object> >[] modifiedProperties)
{
_table.Attach(obj);
if (modifiedProperties == null || modifiedProperties.Count() == 0)
{
_db.Entry(obj).State = EntityState.Modified;
}
else
{
var entry = _db.Entry(obj);
foreach (var modifiedProperty in modifiedProperties)
{
entry.Property(modifiedProperty).IsModified = true;
}
}
return(this);
}