How to write not equal operator in linq to sql?

Question

using (RapidWorkflowDataContext context = new RapidWorkflowDataContext())
                    {
                        var query = from w in context.WorkflowInstanc         


        

Answer 1

You can eliminate join and it should be something like:

var query = from w in context.WorkflowInstances
            where !context.Workflows.Any(c => w.CurrentStateID != c.LastStateID) && EmpWorkflowIDs.Contains((int)w.ID)
            select w;

Answer 2

You need to revise the join to be on the related columns between the 2 tables, then you add your condition in the where clause, like the following:

using (RapidWorkflowDataContext context = new RapidWorkflowDataContext())
                        {
                            var query = from w in context.WorkflowInstances
                                        join c in context.Workflows on w.WorkflowID equals c.ID
                                         where EmpWorkflowIDs.Contains((int)w.ID)
                                         && w.CurrentStateID != c.LastStateID
                                         select w;

                            return query.ToList();
                        }

Answer 3

If you are using lambda expressions, then not(!) goes there:

.Where(p => !p.Whatever...)