Absence of Startup.cs in VS22

Hi,

Since I'm using VS22, the startup.cs file is no longer available. This tutorial requires adding code to the startup.cs. How can this be solved?

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#### Document Details

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* ID: 1dce49db-3548-7dad-bdb1-812efde7ac86
* Version Independent ID: 390a9c7a-2537-25ca-c041-0284c253acff
* Content: [Deploy a model in an ASP.NET Core Web API - ML.NET](https://docs.microsoft.com/en-us/dotnet/machine-learning/how-to-guides/serve-model-web-api-ml-net#register-predictionenginepool-for-use-in-the-application)
* Content Source: [docs/machine-learning/how-to-guides/serve-model-web-api-ml-net.md](https://github.com/dotnet/docs/blob/main/docs/machine-learning/how-to-guides/serve-model-web-api-ml-net.md)
* Product: **dotnet-ml**
* GitHub Login: @luisquintanilla
* Microsoft Alias: **luquinta**