Como corrigir o erro do visual studio não abrir o modo designer do meu formulário.

Question

Answer 1

Hello @Jacob Paixao Tonga COCOJA ,

Welcome to Microsoft Q&A forum.

Please kindly edit your question into English, so that we can better help you:)

Looks like the error message is "There is no editor available for … Make sure the application for the file type (.cs) is installed".

I would firstly suggest you try to repair and update Visual Studio, by opening VS Installer => Update/More => Repair.

If it doesn’t work, try following:

1. Open that .cs file in notepad, prepare a new empty .cs file, copy and paste the code into that new empty .cs file, save it. Replace the original .cs file, check if this works.
2. Using some editors for example Notepad++ to check if the file contains bad characters/incorrect line endings(a terminator)… and try to remove/correct them.
3. Reset VS settings by opening "Developer Command Prompt for Visual Studio" => run devenv /ResetSettings command.

Best Regards,

Tianyu

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