//------------------------------------------------------------------------------
// <copyright file="ConfigurationManagerInternalFactory.cs" company="Microsoft">
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
//------------------------------------------------------------------------------

namespace System.Configuration {

    using System.Configuration.Internal;

    //
    // class ConfigurationManagerInternalFactory manages access to a 
    // single instance of ConfigurationManagerInternal.
    //
    internal static class ConfigurationManagerInternalFactory {
        private const string ConfigurationManagerInternalTypeString = "System.Configuration.Internal.ConfigurationManagerInternal, " + AssemblyRef.SystemConfiguration;

        static private volatile IConfigurationManagerInternal    s_instance;

        static internal IConfigurationManagerInternal Instance {
            get {
                if (s_instance == null) {
                    s_instance = (IConfigurationManagerInternal) TypeUtil.CreateInstanceWithReflectionPermission(ConfigurationManagerInternalTypeString);
                }

                return s_instance;
            }
        }
    }
}