Updated changes not saving to database table

Question

Hi,

 

 This is my code :

 

public List<NotificationData> ReadNotification(int memberId, int NotificationId)
{
using (KiwiDbContext context=new KiwiDbContext(_ConnectionString))
{
NotificationData nd = new NotificationData();
nd.IsRead = true;

var query = (from n in context.Notifications where n.MemberID == memberId && n.NotificationID == NotificationId && n.IsRead == false select new NotificationData { NotificationID = n.NotificationID, Message = n.Message, CreatedTime = n.NotificationTime, IsRead = nd.IsRead });
return query.ToList();


context.SaveChanges();
} 

 

This execution is done but the updated result is not saving to database table

 

Please give me a correct code for that.

 

Thank you.