[C#] Method signatures use incorrect casing when generated since PR #6305

Description

Since Issue #6281 and PR https://github.com/swagger-api/swagger-codegen/pull/6305, the parameters in model constructors are not using the recommended style rules from Microsoft. This creates breaking changes for our users who are using this formatting:

Old:

new Model(argument1: "foo", argument3: "bar")

New:

new Model(Argument1: "foo", Argument3: "bar")

This does not apply to the API method parameters, only model constructor parameters.

Swagger-codegen version

2.3.0

Swagger declaration file content or url

JSON Language Configuration File:

{
    "packageName": "MyApi.Client",
    "apiPackage": "Api"
}

Also, attempting adding "modelPropertyNaming": "camelCase", this provided the desired result for the parameters, but then the models were also named in camelCase.

Command line used for generation

docker run --rm -v /swagger_codegen:/local swaggerapi/swagger-codegen-cli generate -i /v1.json -l csharp -o /local/generated/csharp -c /local/csharp.json

Related issues/PRs

#6281
PR https://github.com/swagger-api/swagger-codegen/pull/6305

Suggest a fix/enhancement

Switch back to using camelCase on the model constructors, per the style guidelines from Microsoft.

Reproduce the issue with the supplied Docker command, C# configuration, and Swagger input, then inspect the generated model constructors rather than API methods. The change is complete when constructor parameters use camelCase while generated model names retain their existing casing, with coverage for the reported naming behavior.