[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10,"_11":12,"_13":14},"actionData","errors","root",{"_165":166,"_167":160},"routes/_root/_root",{"_162":-7,"_41":163,"_137":-7,"_164":-7},"routes/_root.challenges",{"_37":158,"_159":160,"_161":16},"routes/_root.challenges.$challengeCanonical+/_root",{"_68":69,"_70":71,"_72":73},"routes/_root.challenges.$challengeCanonical+/writeups",{"_15":16,"_17":16,"_18":19,"_20":21,"_22":23},"solved",false,"hasWriteup","writeups",[24,25,26,27],"name","C# File-based app","canonicalName","csharp-file-based-app",{"_28":61,"_30":62,"_32":63,"_34":16,"_35":16,"_36":16,"_37":38,"_39":64,"_41":42,"_43":16,"_44":65},{"_28":55,"_30":56,"_32":57,"_34":16,"_35":16,"_36":16,"_37":38,"_39":58,"_41":42,"_43":16,"_44":59},{"_28":48,"_30":49,"_32":50,"_34":16,"_35":16,"_36":16,"_37":38,"_39":51,"_41":42,"_43":16,"_44":52},{"_28":29,"_30":31,"_32":33,"_34":16,"_35":16,"_36":16,"_37":38,"_39":40,"_41":42,"_43":16,"_44":45},"author",{"_20":46,"_47":-5},"writeupElementId","55601b4d","writeupId","55601b4d-c4c2-4ce6-865a-a4a0fbd53b34","canEdit","canLike","likedByViewer","title","Writeup for C# File-based app","url","https://github.com/baumroll0928-spec/myRepository/tree/main/Daily_AlpacaHack/m202610/d02_Csharp_File-based_app","language","ja","isOfficial","createdAt",["D",1790980516470],"baumroll1234","gravatarHash",{"_20":53,"_47":54},"da03c7b4","da03c7b4-a41b-4009-9e30-a13845b82920","https://blog.sl91994.com/posts/csharp_file_based_app/",["D",1790978556877],"nirvana","19230d0bc032c2027fc6fb6f83981b557ebf2f2e8a0144244413b987d4eb583a",{"_20":60,"_47":-5},"ffda33e8","ffda33e8-5cce-499a-8df5-21bd2af17c3f","https://github.com/Not-Runad/AlpacaHack_Writeups/blob/main/writeups/Csharp_File-based_app.md",["D",1790955784089],"lumma",{"_20":66,"_47":67},"61555f36","61555f36-fc93-49af-815c-b3339f36971f","https://github.com/tadanobutubutu/csharp-file-based-app-solve/blob/main/README.md",["D",1790953638176],"tadanobutubutu","32d088d6e11be98c7280952c1fdfeb6a6ee1b5056555fe814e35720483c99e51","challenge",{"_20":21,"_22":23,"_77":78,"_79":80,"_81":82,"_83":84,"_85":86,"_87":-7,"_88":89,"_90":91,"_92":16,"_93":-7,"_94":95,"_96":-7,"_97":-7,"_36":16,"_98":99,"_100":101,"_102":16,"_103":-7,"_104":16,"_105":-7,"_106":-7,"_107":108,"_109":-7,"_110":-7,"_111":-7,"_112":113,"_114":16,"_115":113,"_35":113,"_116":16,"_117":-7,"_118":119,"_120":121,"_122":123,"_124":125},"availablePages",[74,75,76],"canonicalUrl","https://alpacahack.com/challenges/csharp-file-based-app","Description","Solves","Writeups","solves",40,"difficulty",25,"flagFormat","Alpaca{[\\x20-\\x7E]+}","categories",[155],"attachments",[151],"remote","description","Thanks to the [File-based apps](https://learn.microsoft.com/en-us/dotnet/core/sdk/file-based-apps) feature added in .NET 10, we can now run a `.cs` file directly!\n\n

Beginner Hint 1: Implicit using directives feature in C#

\n\n- The [Implicit using directives](https://learn.microsoft.com/en-us/dotnet/core/project-sdk/overview#implicit-using-directives) feature was added in .NET 6. By default, several namespaces are automatically `globally using`.\n- Therefore, `using System;` can be omitted in `chal.cs`. Please be careful when investigating various APIs.\n\n

\n\n

Beginner Hint 2: How to handle the Brotli compression format

\n\n- There are various ways to handle the Brotli compression format, such as using .NET (similar to `chal.cs`) or JavaScript. In JavaScript, we can use the [`zlib` module](https://nodejs.org/api/zlib.html) in Node.js, or the [`DecompressionStream` interface](https://developer.mozilla.org/en-US/docs/Web/API/DecompressionStream) in certain browsers. If you are unsure how to decompress Brotli-compressed data, you might want to try these languages.\n\n

\n","descriptionJa",".NET 10で追加された[File-based apps](https://learn.microsoft.com/en-us/dotnet/core/sdk/file-based-apps)機能のおかげで、`.cs`ファイルそのものを実行できるようになりました！\n\n

初心者向けヒント1: C#のImplicit using directives機能

\n\n- .NET 6で[Implicit using directives](https://learn.microsoft.com/en-us/dotnet/core/project-sdk/overview#implicit-using-directives)機能が追加されました。デフォルトで、いくつかの名前空間が自動的に`global using`されます。\n- そのため、`chal.cs`では`using System;`を省略できています。各種APIを調査する際にはご注意ください。\n\n

\n\n

初心者向けヒント2: Brotli圧縮形式の扱い方

\n\n- Brotli圧縮形式を扱う方法には、`chal.cs`同様に.NETで扱う方法や、JavaScriptで扱う方法があります。JavaScriptでは、Node.jsでは[`zlib`モジュール](https://nodejs.org/api/zlib.html)で、またブラウザによっては[`DecompressionStream`インターフェース](https://developer.mozilla.org/en-US/docs/Web/API/DecompressionStream)で扱えます。Brotli圧縮形式の展開方法に迷った場合は、それらを試してみるといいかもしれません。\n\n

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