Returning IQueryable or Enumerated Object

Posted by Tarik on Stack Overflow See other posts from Stack Overflow or by Tarik
Published on 2010-04-07T05:42:44Z Indexed on 2010/04/07 6:03 UTC
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Hello everyone,

I was wondering about the performance difference between these two scenarios and what could the disadvantages be over each other?

First scenario :

public class Helper //returns IQueryable
{
   public IQueryable<Customer> CurrentCustomer
   {
      get{return new DataContext().Where(t=>t.CustomerId == 1);
   }
}

public class SomeClass
{
    public void Main()
    {
       Console.WriteLine(new Helper().CurrentCustomer.First().Name;
    }
}

The second scenario :

public class Helper //returns Enumerated result
{
   public Customer CurrentCustomer
   {
      get{return new DataContext().First(t=>t.CustomerId == 1);
   }
}

public class SomeClass
{
    public void Main()
    {
       Console.WriteLine(new Helper().CurrentCustomer.Name;
    }
}

Thanks in advance.

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