DataAccessLayer.DataBase.RegisterRoles C# (CSharp) Method

        public int RegisterRoles()
        {           
           var queryString =
                 "SET IDENTITY_INSERT[dbo].[Roles] ON "                           +
                 "INSERT INTO[dbo].[Roles] ([RoleId], [Name]) VALUES(1, 'User'); " +
                 "INSERT INTO[dbo].[Roles] ([RoleId], [Name]) VALUES(2, 'User,Moder'); " +
                 "INSERT INTO[dbo].[Roles] ([RoleId], [Name]) VALUES(3, 'User,Moder,Admin'); " +
                 "SET IDENTITY_INSERT[dbo].[Roles] OFF; ";

            using (SqlConnection connection = new SqlConnection(_connectionString))
            {
                var command = new SqlCommand(queryString, connection);

                try
                {
                    connection.Open();
                    return command.ExecuteNonQuery();
                }
                catch (Exception)
                {
                    throw;
                }
            }
        }
    }