Restore Database Failed: Exclusive access could not be obtained because the database is in use

Solution 1: Set to single user, then restore
Alter Database [<Database Name>]
  SET SINGLE_USER With ROLLBACK IMMEDIATE

RESTORE DATABASE [<Database Name>] FROM  DISK = N'E:\Databases\SampleDatabase.bak' WITH  FILE = 1,  MOVE N'Tfs_Silverlight' TO N'C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\SampleDatabase.mdf',  MOVE N'SampleDatabase_log' TO N'C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\SampleDatabase.LDF',  NOUNLOAD,  REPLACE,  STATS = 10
GO

Solution 2: Restart SQL Server service
1. Start -> Run and type in services.msc
2. Right click on the SQL Server instance (MSSQLSERVER), click Stop and then Start the service
3. Do the restore process