How to use stringbuilder for below query

Hi,
How to use stringbuilder for below query
cmd.CommandText = @"Select tc.CountryID, tb.DealID, tb.StartDate, tb.EndDate, tb.Description, tb.IsApproved, tb.CreatedBy From tblCountry as tc inner join tblBid as tb on tc.CountryID = tb.CountryID Where (tc.CountryID=@CountryID) and (tb.StartDate>=@StartDate AND tb.EndDate<=@EndDate)";
Thanks in advance.

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