how to format all single action methods into a lambda expression methods when saving a file?

Question

my method

public void Method()
{
    OneAction;
}

need format in

Method() => OneAction;

That's not a Lambda, it's an expression body applied to a Method. You usually configure that style in the Options related to the language code style. Then you can run an analyzer (Code Cleanup) configured to handle expression / block body preferences. The code cleanup can also be configured to run on save (IIRC Options ->Text Editor -> Code cleanup), specifying the configured profile, if that's what you're talking about — Jimi, Commented Mar 22 at 6:45

shingo · Accepted Answer · 2025-03-22 07:10:22Z

If you can accept manual formatting, you can place the cursor on your method and choose to apply this style to the document/project/solution from the IntelliCode suggestions.
If you insist on formatting when saving files, you can:
1. Set the Use expression body for methods item in the C# code style to When possible
  
  Or add csharp_style_expression_bodied_methods = true to the .editorconfig file.
2. Configure a code cleanup profile, adding the Apply expression/block body preferences item to fixer list.
3. In the Text Editor > Code Cleanup options page, select the profile and enable Run Code Cleanup profile on Save

1 Answer 1