return columns.All(new Func<string, bool>(list.Contains));

internal static bool VerifyColumns(SqlConnection conn, string table, params string[] columns)
        {
            List<string> list = new List<string>();
            using (SqlCommand sqlCommand = new SqlCommand("SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS where TABLE_NAME=@Table", conn))
            {
                sqlCommand.Parameters.Add(new SqlParameter("Table", table));
                using (SqlDataReader sqlDataReader = sqlCommand.ExecuteReader())
                {
                    while (sqlDataReader.Read())
                    {
                        list.Add(sqlDataReader.GetString(0));
                    }
                }
            }
            return columns.All(new Func<string, bool>(list.Contains));
        }