Local sequence cannot be used in LINQ to SQL implementation of query operators except the Contains() operator

Question

I am using LINQ in my project and my code is:

var SE = from c in Shop.Sections
                    join c1 in obj.SectionObjects on c.SectionId equals c1.Sec         


        

Answer 1

var SE = from c in Shop.Sections.AsEnumerable().ToList() join c1 in obj.SectionObjects.AsEnumerable().ToList() on c.SectionId equals c1.SectionId select c;

dataGridView1.DataSource = SE;