When to Use TransactionScope / Begin Tran .?

Question

Hi Frnds.

 

   There are two ways to maintain transactions

      1 .Net (TransactionScope)

      2  From SQL Server  (Begin Tran) 

 

my Questions are.?

   When to use  .Net (TransactionScope).?

   When to use   SQL Server (Begin Tran).?

   Which one is sutable.? 

   If  .Net (TransactionScope) is sutable then what kind of applications.?

   Performance wise which is sutable.?

 

Share your experiance .

 

Thanks In Advance.