Sp for Creating db

Stored procedure for creating database.
When you want to create database at run time using c# .net here is stored procedure execute this and pass database name as parameter.

Create proc [dbo].[usp_Database]
(
@dbName varchar(50)
)
as

IF NOT EXISTS (SELECT 'True' FROM INFORMATION_SCHEMA.SCHEMATA WHERE CATALOG_NAME = @dbName)
-- DROP DATABASE ' + @dbName + '

DECLARE @device_directory NVARCHAR(520)
SELECT @device_directory = SUBSTRING(physical_name, 1, CHARINDEX(N'master.mdf', LOWER(physical_name)) - 1)
FROM sys.database_files
WHERE (name = N'master')

EXECUTE (N'CREATE DATABASE ' + @dbName + '
ON
(NAME = ' + @dbName + ',
FILENAME = ''' + @device_directory + '' + @dbName + '.mdf'',
SIZE = 50MB,
MAXSIZE = 125MB,
FILEGROWTH = 10MB)
LOG ON
(NAME = ''NorthwindBulkLog'',
FILENAME = ''' + @device_directory + '' + @dbName + '.ldf'',
SIZE = 5MB,
MAXSIZE = 25MB,
FILEGROWTH = 5MB)')