Add the in modifier to pass an argument by reference and declare your design intent to pass arguments by reference to avoid unnecessary copying. You don't intend to modify the object used as that argument.

I guess this statement was not about to repeat double to pass (an) argument by reference and then directly address reader.

It should be something like

Add the in modifier to pass an argument by reference and declare your design intent to preserve referenced object state.

Document Details

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• ID: ac8804c7-6acd-ab2a-4e14-0b99265969a5
• Version Independent ID: 183efcbd-a781-d303-f9cd-1c22da1676de
• Content: Write safe and efficient C# code
• Content Source: docs/csharp/write-safe-efficient-code.md
• Product: dotnet-csharp
• Technology: csharp-advanced-concepts
• GitHub Login: @BillWagner
• Microsoft Alias: wiwagn

Associated WorkItem - 54745