File: Completion\CompletionProviders\LastBuiltInCompletionProvider.cs
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Project: src\src\Features\CSharp\Portable\Microsoft.CodeAnalysis.CSharp.Features.csproj (Microsoft.CodeAnalysis.CSharp.Features)
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System;
using System.Composition;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Completion;
using Microsoft.CodeAnalysis.Host.Mef;
 
namespace Microsoft.CodeAnalysis.CSharp.Completion.Providers;
 
/// <summary>
/// Provides a completion provider that always appears after all built-in completion providers. This completion
/// provider does not provide any completions.
/// </summary>
[ExportCompletionProvider(nameof(LastBuiltInCompletionProvider), LanguageNames.CSharp)]
[ExtensionOrder(After = nameof(ReferenceDirectiveCompletionProvider))]
[Shared]
internal sealed class LastBuiltInCompletionProvider : CompletionProvider
{
    [ImportingConstructor]
    [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
    public LastBuiltInCompletionProvider()
    {
    }
 
    public override Task ProvideCompletionsAsync(CompletionContext context)
        => Task.CompletedTask;
}