File: Filters\MiddlewareFilterBuilderStartupFilter.cs
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Project: src\src\Mvc\Mvc.Core\src\Microsoft.AspNetCore.Mvc.Core.csproj (Microsoft.AspNetCore.Mvc.Core)
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
 
namespace Microsoft.AspNetCore.Mvc.Filters;
 
internal sealed class MiddlewareFilterBuilderStartupFilter : IStartupFilter
{
    public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
    {
        return MiddlewareFilterBuilder;
 
        void MiddlewareFilterBuilder(IApplicationBuilder builder)
        {
            var middlewarePipelineBuilder = builder.ApplicationServices.GetRequiredService<MiddlewareFilterBuilder>();
            middlewarePipelineBuilder.ApplicationBuilder = builder.New();
 
            next(builder);
        }
    }
}