I have these lines of code and it always has been working just fine until today.
protected void btnDeleteAll_Click(object sender, EventArgs e)
{
MassEmailOptOutDataContext dcUsers = new MassEmailOptOutDataContext();
IEnumerable<emailSubscriber> optOutUsers = (from allUsers in dcUsers.emailSubscribers select allUsers).ToList();
dcUsers.emailSubscribers.DeleteAllOnSubmit(optOutUsers);
dcUsers.SubmitChanges();
}
This is the error when I tried to delete all records.
Specified cast is not valid.
Description: An unhandled exception occurred during the execution of the current web reques ...
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