Ignoring the syntax problems (which is because you're missing a comma between the two parameters), this is generally not a good idea and will probably lead to performance problems in the long run.
http://sqlinthewild.co.za/index.php/2009/09/15/multiple-execution-paths/
Also, what is
where CompanyName=CompanyName
supposed to do?
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability