Private instance fields naming convention not followed

_This issue has been moved from [a ticket on Developer Community](https://developercommunity.visualstudio.com/t/Private-instance-fields-naming-conventio/10617834)._

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[severity:It bothers me. A fix would be nice]
It appears that the naming convention is not followed for the the Account class fields. It is because the following link https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/coding-style/identifier-names states:
"Private instance fields start with an underscore (_) and the remaining text is camelCased."

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#### Document Details

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* ID: 3edbf125-784e-14eb-5989-7f0334dc659b
* Version Independent ID: 8bca01b4-44f9-31fd-8616-fc8bed9275ef
* Content: [lock statement - synchronize thread access to a shared resource - C#](https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/statements/lock)
* Content Source: [docs/csharp/language-reference/statements/lock.md](https://github.com/dotnet/docs/blob/main/docs/csharp/language-reference/statements/lock.md)
* Service: **dotnet-csharp**
* Sub-service: **lang-reference**
* GitHub Login: @BillWagner
* Microsoft Alias: **wiwagn**