Exec sp_configure filesteam_access_level, 2
RECONFIGURE 

--Create filestreamgroup 
ALTER DATABASE [Archive]
ADD FILEGROUP [FileStreamGroup] CONTAINS FILESTREAM 
GO
--Create filestream and association with filestreamgroup above
ALTER DATABASE [Archive]
ADD FILE ( NAME = N'FileStream', FILENAME = N'D:\Company\Data\SQL Server\FileStream') TO FILEGROUP [FileStreamGroup]
GO

--Create table
CREATE TABLE Archive.dbo.Attachment (
  [ID] [UNIQUEIDENTIFIER] ROWGUIDCOL NOT NULL PRIMARY KEY,
  [FileName] NVARCHAR(100) NULL,
  [CreateUser] NVARCHAR(100) NULL,
  [CreateDatetime] DATETIME NULL,
  [Content] VARBINARY(MAX) FILESTREAM NULL 
)
FILESTREAM_ON [FileStreamGroup] 

 --Insert some records
INSERT INTO Attachment VALUES 
(NEWID(),'File Name 1','shg.cpan', GETDATE(),NULL),
(NEWID(),'File Name 1','shg.cpan', GETDATE(),CAST('' AS VARBINARY(MAX))),
(NEWID(),'File Name 1','shg.cpan', GETDATE(),CAST('This is a attachment, which contains all introduction for filestream' AS VARBINARY(MAX))) 

using (SqlConnection conn = new SqlConnection("server=10.7.15.172;database=Archive;uid=sa;pwd=1234;Connect Timeout=180"))
{
  conn.Open();
  using (SqlCommand cmd = conn.CreateCommand())
  {
    string id = Guid.NewGuid().ToString();
    cmd.CommandText = "INSERT INTO Attachment VALUES('" + id + "','File Name 2','shg.cpan','" + DateTime.Now + "',@content)";
    SqlParameter param = new SqlParameter("@content", SqlDbType.VarBinary, 1000000000);
    param.Value = File.ReadAllBytes(@"D:\Folder\131 u_ex151207.log");
    cmd.Parameters.Add(param);
    cmd.ExecuteNonQuery();
  }
  conn.Close();
}

SELECT DATALENGTH(CONTENT)/(1024.0 * 1024.0) AS MB,* FROM ATTACHMENT