How to support Contains in Entity Framework 3.5

var ids = new List<int>() { 1, 2, 3, 500 };
using (var context = new AdventureWorksEntities())
{
  var products = from product in context.Products
                           where ids.Contains(product.ProductID)
                           select product;
  WriteProducts(products);
}

var ids = new List<int>() { 1, 2, 3, 500 }; using (var context = new AdventureWorksEntities()) { var products = from product in context.Products where ids.Contains(product.ProductID) select product; WriteProducts(products); }

var ids = new List<int>() { 1, 2, 3, 500 };
using (var context = new AdventureWorksEntities())
{
  Expression<Func<Product, bool>> idMatching = null; 
  foreach (var id in ids)
  {
    int productId = id;
    if(idMatching == null)
    {
      idMatching = x => x.ProductID == productId;
    }
    else
    {
      idMatching = idMatching.Or(x => x.ProductID == productId);
    }
  }
  var products = context.Products.Where(idMatching);
  WriteProducts(products);
}

var ids = new List<int>() { 1, 2, 3, 500 }; using (var context = new AdventureWorksEntities()) { Expression<Func<Product, bool>> idMatching = null; foreach (var id in ids) { int productId = id; if(idMatching == null) { idMatching = x => x.ProductID == productId; } else { idMatching = idMatching.Or(x => x.ProductID == productId); } } var products = context.Products.Where(idMatching); WriteProducts(products); }