// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

namespace NuGetClone.Frameworks
{
    internal sealed class DefaultCompatibilityProvider : CompatibilityProvider
    {
        public DefaultCompatibilityProvider()
            : base(DefaultFrameworkNameProvider.Instance)
        {
        }

        private static IFrameworkCompatibilityProvider? _instance;

        public static IFrameworkCompatibilityProvider Instance
        {
            get
            {
                if (_instance == null)
                {
                    _instance = new DefaultCompatibilityProvider();
                }

                return _instance;
            }
        }
    }
}