Msg 3702, Level 16, State 3, Line 2 Cannot drop database “DataBaseName” because it is currently in use.

Try to drop a SQL database, but get following errors:

USE Master;
GO
DROP DATABASE dbTEST;
GO

Msg 3702, Level 16, State 4, Line 1
Cannot drop database "dbTEST" because it is currently in use.

SOLUTION

Kill the blocking sessions, or set database in SINGER_USER mode with “Rollback Immediate” option to kill  and rollback the transactions.

USE [master]
GO
ALTER DATABASE dbTEST SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
GO
USE [master]
GO
DROP DATABASE dbTEST;
GO

After this, check both data files and log files are cleaned up as well.