[BUG] Passing {constraints: { additionalProperties: false }} to the CSharpGenerator's generate method still generates an AdditionalProperties property in the model file

[mgmccarthy]

Describe the bug.

Currently, when I generate C# models from AsyncAPI input and specific I do not want the additional AdditionalProperties property included in the generated model, it does now work:

const generator = new CSharpGenerator({ autoImplementedProperties: true });

... 

const models = await generator.generate(mappedSchema,
{
    modelName: messageName,
    constraints: { additionalProperties: false }
});

the output still contains an AdditionalProperties method (which is not in the yaml file)
public Dictionary<string, dynamic>? AdditionalProperties { get; set; }

Expected behavior

that setting additionalProperties: false does not render:
public Dictionary<string, dynamic>? AdditionalProperties { get; set; }

in the generated model file

Screenshots

How to Reproduce

1. I wrote a javascript file (generate-csharp-models.js) to import my AsyncAPI file and generate C# models
2. I ran node generate-csharp-models.js
3. The generated model still contains the AdditionalProperties property

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👀 Have you checked for similar open issues?

• I checked and didn't find similar issue

🏢 Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to work on this issue ?

None

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[mgmccarthy]

I found a workaround that seems to suppress the generation of the AdditionalProperties property in the generated model.

Right before calling generator.generate, I added this line:

mappedSchema.additionalProperties = false; and that prevented the AdditionalProperties property from being rendered to the model

so, the code that works is:

const generator = new CSharpGenerator({ autoImplementedProperties: true });

...

mappedSchema.additionalProperties = false;

const models = await generator.generate(mappedSchema,
{
    modelName: messageName,
    constraints: { additionalProperties: false }
});