need a suggestion for debugging LINQ IMultipleResults

Question

I've got a stored procedure that returns two possible result sets. If successful, it returns a 0 (int). If it fails it returns -1 and a table containing a list of errors. I'm trying to figure out how to deal with this using LINQ.

I found Scott Guthrie's post about this, but he was using results that were mapped to types/tables. I had to go to the length of defining my own type for the errors table:

public partial class myStoredProcResult
    {

      ...

        [Column(Storage = "_error", DbType = "varchar(max) NULL")]
        public string error
        {
          ...
        }

        [Column(Storage = "_msg", DbType = "varchar(max) NULL")]
        public string msg
        {
           ...
        }


    }

I've logged the EXECUTE that's being generated and it's correct. If I copy that generated sql over to a query window it returns a table containing errors then an int with the error code.

Refactoring the output signature of the proc is not an option.

[Function(Name="dbo.myStoredProc")]
 [ResultType(typeof(myStoredProcResult))]   
public IMultipleResults myStoredProc (...)
{
   IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)    
       (MethodInfo.GetCurrentMethod())), ...);
   return ((IMultipleResults)(result.ReturnValue));
}

But whenever I run this proc I get a Return value (-1, correct) but no myStoredProcResult object. Calling result.GetResult() on the IMultipleResults that's returned only gives me a -1, which is the same as I had before I added the multi results set. I wish I could just dump this thing to a dataset :(