Func<DataClassesDataContext, int, IQueryable<Product>> compiledQuery =
    CompiledQuery.Compile((DataClassesDataContext meta, int IdToFind) =>
                          (from myData in meta.Products
                           where myData.ProductID.Equals(IdToFind)
                           select myData));

StringBuilder Test = new StringBuilder();
int[] MiaSeira = { 5, 6, 10, 100, 7 };

using (DataClassesDataContext context = new DataClassesDataContext())
{
    context.ObjectTrackingEnabled = false;

    for (int i = 0; i < 100; i++)
    {
        foreach (int EnaID in MiaSeira)
        {
            var oFindThat2P = compiledQuery(context, EnaID);

            foreach (Product One in oFindThat2P)
            {
                Test.Append("<br />");
                Test.Append(One.ProductName);
            }
        }
    }
}

StringBuilder Test = new StringBuilder();
 int[] MiaSeira = { 5, 6, 10, 100, 7 };
 for (int i = 0; i < 100; i++)
 {
     foreach (int EnaID in MiaSeira)
     {
         var Products = (from product in Product.
             where MiaSeira.Contains(product.ProductID)
             select product).ToList();

         if (Products == null || Products.Count == 0)
             continue;

         foreach (Product product in Products)
         {
            Test.Append("<br />");
            Test.Append(product.ProductName);
         }
     }
 }

 txtDebug.Text = Test.ToString();