The query results cannot be enumerated more than once

Title: Error: The query results cannot be enumerated more than once

Details: Ever tried using Linq DataContext model ( using the dbml file ) and try iterating from the return type ISingleResult ? If so, you might have got the error for sure. So, the simple way to do it is to obtain the results to a generic list as shown below.

Code: Consider that GetUserDetails returns a ISingleResult generic list type of GetUserDetailsResult

 List<GetUserDetailsResult> results = GetUserDetails().ToList();
 foreach (GetUserDetailsResult result in results)
 {
     // Write your code here...
 }