private void productButton_Click(object sender, EventArgs e) { var s = new WindowsFormsApplication1.AdventureWorksEntities(); var q = from c in s.Product select c; dataGridView1.DataSource = q.ToList(); } private void productCategoryButton_Click(object sender, EventArgs e) { var s = new WindowsFormsApplication1.AdventureWorksEntities(); var q = from c in s.ProductCategory select c; dataGridView1.DataSource = q.ToList(); }