"Incorrect Syntex Near GO"

Question

Why i am Getting Errror  Near Go. Below Is my Query 

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string Qry = "USE master\n"+

"GO\n"+

"ALTER DATABASE STDMGMT\n"+

"SET SINGLE_USER\n"+

"WITH ROLLBACK IMMEDIATE\n"+

"GO\n"+

"RESTORE DATABASE STDMGMT FROM DISK = '"+Bak+"'\n"+

"GO";

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