>>I only use the sp_executesql when I've to execute dynamic SQL and return value(s) to the calling code. I don't remember ever using it from SSMS directly.
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>Ok, based on your other message, basically, if sp_executesql makes a better use of the execution plan, then, would it be better to use this approach instead of using the SQLParameter object to create parameters and use a regular SQL command through the SQLClient data provider to access SQL Server?

Not sure for NET, but when in VFP I use parameters in my queries VFP explicitly use sp_executesql to run this query.
Just run SQL Profiler and see what command is send to SQL Server when you use parameters.