SQL语句中如何把文件以二进制数组形式存入数据库

System.IO.FileStream fs = new FileStream("1.txt", FileMode.Open);
            string strConn = "Data Source=MOFEI-PC;Initial Catalog=Test;Integrated Security=True";
            SqlConnection conn = new SqlConnection(strConn);
            int v = ;
            string sql = @"INSERT INTO [Test].[dbo].[TestB]([ID] ,[B]) VALUES(" + v + " ,@b)";
            using (conn)
            {
                int fslength = (int)fs.Length;
                byte[] Data = new Byte[fslength];
                fs.Read(Data, , fslength);
                SqlParameter prm1 = new SqlParameter("@b", SqlDbType.VarBinary, fslength, ParameterDirection.Input, true, , , " ", DataRowVersion.Current, Data);
                if (conn.State == System.Data.ConnectionState.Closed)
                {
                    conn.Open();
                }
                using (SqlCommand cmd = new SqlCommand(sql, conn))
                {
                    cmd.Parameters.Add(prm1);
                    int r1 = cmd.ExecuteNonQuery();
                }
            }