Linq error: not contain a definition for 'InsertOnSubmit'

Question

I have following code:

   public static bool Update(UserExtendedData data, byte[] image)
        {

            data.UserId = getUserId_new();

            IQueryable<UserExtendedData> entry = m_model.UserExtendedDataSet.Where(x => x.UserId == getUserId_new());
            UserExtendedData User = entry.Single();
            User.firstName = data.firstName;
            User.lastName = data.lastName;
            User.phoneNo = data.phoneNo;
            User.creditCardNo = data.creditCardNo;
            User.dateOfBirth = data.dateOfBirth;
            User.UserId = getUserId_new();

            if (image != null)
            {
                User.avatarArt = image;
            }
            m_model.UserExtendedDataSet.InsertOnSubmit(data);

            return true;
        }

I have include using System.Data.Linq; i'm using asp.net 4.5 on windows 7 (x64) i also include:

 <compilation debug="true" targetFramework="4.5">

but i still got error:

does not contain a definition for 'InsertOnSubmit' and no extension method 'InsertOnSubmit' accepting a first argument of type ' could be found (are you missing a using directive or an assembly reference?) 

But what is weird i got no problems with:

public static bool Insert(UserExtendedData data, byte[] image)
        {

            data.UserId = getUserId_new();

                if (image != null)
                    data.avatarArt = image;

                m_model.UserExtendedDataSet.Add(data) ;
                m_model.SaveChanges();
                return true;
        }

Do you have any ideas what could cause this problem ? I will really appreciate any help.

Answer 1

What is your Entity set file extension ? If it is dbml then it will work else not in case of dbmx

Reference