mcs/class/referencesource/System.ComponentModel.DataAnnotations/DataAnnotations/AppSettings.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="AppSettings.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //------------------------------------------------------------------------------
   6
   7 // AppSettings.cs
   8 //
   9
  10 using System;
  11 using System.Collections.Specialized;
  12 using System.Configuration;
  13 using System.Diagnostics.CodeAnalysis;
  14
  15 namespace System.ComponentModel.DataAnnotations {
  16     internal static class AppSettings {
  17         private static volatile bool _settingsInitialized = false;
  18         private static object _appSettingsLock = new object();
  19         private static void EnsureSettingsLoaded() {
  20             if (!_settingsInitialized) {
  21                 lock (_appSettingsLock) {
  22                     if (!_settingsInitialized) {
  23                         NameValueCollection settings = null;
  24
  25                         try {
  26                             settings = ConfigurationManager.AppSettings;
  27                         }
  28                         catch (ConfigurationErrorsException) { }
  29                         finally {
  30                             if (settings == null || !Boolean.TryParse(settings["dataAnnotations:dataTypeAttribute:disableRegEx"], out _disableRegEx))
  31                                 _disableRegEx = false;
  32
  33                             _settingsInitialized = true;
  34                         }
  35                     }
  36                 }
  37             }
  38         }
  39
  40         private static bool _disableRegEx;
  41         internal static bool DisableRegEx {
  42             get {
  43                 EnsureSettingsLoaded();
  44                 return _disableRegEx;
  45             }
  46         }
  47     }
  48 }