// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace Microsoft.Extensions.Options.Contextual.Provider;
 
/// <summary>
/// Provides helper methods for a configuration context. This class can't be inherited.
/// </summary>
public static class NullConfigureContextualOptions
{
    /// <summary>
    /// Gets a singleton instance of an empty configuration context.
    /// </summary>
    /// <typeparam name="TOptions">The options type to configure.</typeparam>
    /// <returns>A do-nothing instance of <see cref="IConfigureContextualOptions{TOptions}"/>.</returns>
    public static IConfigureContextualOptions<TOptions> GetInstance<TOptions>()
        where TOptions : class
        => NullConfigureContextualOptions<TOptions>.Instance;
}