Execute a large SQL script (with GO commands)

Too difficult :)

Create array of strings str[] replacing GO with ",@" :

            string[] str ={
                @"
USE master;
",@"


CREATE DATABASE " +con_str_initdir+ @";
",@"
-- Verify the database files and sizes
--SELECT name, size, size*1.0/128 AS [Size in MBs] 
--SELECT name 
--FROM sys.master_files
--WHERE name = N'" + con_str_initdir + @"';
--GO

USE " + con_str_initdir + @";
",@"

SET ANSI_NULLS ON
",@"
SET QUOTED_IDENTIFIER ON
",@"

IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Customers]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Customers](
    [CustomerID] [int] IDENTITY(1,1) NOT NULL,
    [CustomerName] [nvarchar](50) NULL,
 CONSTRAINT [PK_Customers] PRIMARY KEY CLUSTERED 
(
    [CustomerID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
",@"



SET ANSI_NULLS ON
",@"
SET QUOTED_IDENTIFIER ON
",@"
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[GOODS]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[GOODS](
    [GoodsID] [int] IDENTITY(1,1) NOT NULL,
    [GoodsName] [nvarchar](50) NOT NULL,
    [GoodsPrice] [float] NOT NULL,
 CONSTRAINT [PK_GOODS] PRIMARY KEY CLUSTERED 
(
    [GoodsID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
",@"
SET ANSI_NULLS ON
",@"
SET QUOTED_IDENTIFIER ON
",@"
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Orders]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Orders](
    [OrderID] [int] IDENTITY(1,1) NOT NULL,
    [CustomerID] [int] NOT NULL,
    [Date] [smalldatetime] NOT NULL,
 CONSTRAINT [PK_Orders] PRIMARY KEY CLUSTERED 
(
    [OrderID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
",@"
SET ANSI_NULLS ON
",@"
SET QUOTED_IDENTIFIER ON
",@"
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[OrderDetails]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Order