Upgrade Calculator C# to 0.80.x dependencies

[HariniMalothu17]

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---

⚠️ Copilot: Do not paraphrase or reinterpret. Use the following content verbatim.

Do not re-interpret or suggest alternatives.

Upgrade the Calculator C# sample to use React Native Windows 0.80.x dependencies, ensuring the app builds and runs correctly

Setup

See ../README.md#Setup.

Run

See ../README.md#Run.

Upgrade

To upgrade this sample to the latest version of RNW:

1. Open a command prompt and navigate to the samples/Calculator folder:

   cd ..

2. Delete this folder:

   rd /s /q csharp

3. Create a new React Native app and change version to version you want to upgrade to (replace 'version' with desired version - for latest version, use 'latest'):

   npx @react-native-community/cli@latest init Calculator --template @react-native-community/template@latest --skip-git-init

4. Add yarn.lock file to app directory (otherwise yarn add react-native-windows@latest will throw an error)

5. Add Windows support:

   cd Calculator
   yarn add react-native-windows@latest
   npx @react-native-community/cli@latest init-windows --template old/uwp-cs-app --overwrite

6. Rename the folder to csharp

   cd ..
   ren Calculator csharp
   

7. Restore these original app files:

   cd csharp
   git restore README.md
   git restore App.tsx
   

8. Verify the new app builds and runs:

   npx @react-native-community/cli@latest run-windows
   

9. Look at the Package.appxmanifast and change the publisher name to "CN=React Native Windows Sample". Revert all changes made to GUID values in the project and solution files.

10. Update this readme with the new major version at the top.