sql - How to set isolation level on SqlCommand/SqlConnection initialized with no transaction -

the following method supposed peroform dirty read on open connection. there no transactions. set isolationlevel?

public string dodirtyread(string storedprocname, sqlconnection connection) {     using (sqlcommand command = new sqlcommand(storedprocname, connection))     {         command.commandtype = commandtype.storedprocedure;         // how set isolationlevel read_uncommitted here?         command.executenonquery();     } } 

on begintransaction method: (msdn link)

and if want use hints in sp @ table level, use with(nolock) - use @ own risk.