Return Resultset As Output Parameter To VB Application

I need to return a resultset consisting of database errors from SQL Server stored procedure's CATCH CLAUSE but stuck with it. Do I need to use cursors to return resultset and if so, then what is the type declaration for the OUTPUT parameter in my .NET application? I tried 'Object' and 'Variant' but did not work.

I also tried the simple way just using a SELECT statement to return and it works with one stored procedure but not with another as thus in my CATCH CLAUSE:

Code:
while (@I <= @count)
begin
BEGIN TRY
-- delete all previous rows inserted in @customerRow for previous counts @I
delete from @customerRow
-- this is inserting the current row that we want to save in database
insert into @customerRow

[Code] .....

This does not work when select is made in the CATCH block, ie it returns no rows to my .NET application:

Code:
begin catch
IF @@TranCount > 0 or XACT_STATE()= -1 ROLLBACK TRANSACTION;
DECLARE @ErrorMessage NVARCHAR(4000);
DECLARE @ErrorSeverity INT;
DECLARE @ErrorState INT;
DECLARE @ErrorLine INT;
SELECT @ErrorMessage = ERROR_MESSAGE();

[Code] ....

Just to summarize the code and where the problem is. The code that works uses a SELECT * from temporary table not in the CATCH block and this works while the one that uses the same SELECT * from temporary table inside the CATCH does not return anything! Strange. The Wrong one is used in another Stored procedure from the Right one btw so am wondering why the same code does not work in those two different situations.