fix(csharp): avoid generating property accessors on const fields with autoImplementedProperties

[alexanderxfgl-bit]

Resolves #2591

Description

When generating C# models for properties declared with const in the schema and with auto-implemented properties enabled, the generator was emitting invalid C# syntax by adding getter property accessors to a const field:

public const string EventType { get; } = "OnEntryStarted";

Since C# consts are fields and cannot have property accessors, this results in compiler errors (e.g. CS0107).

This fix removes the { getter } accessors when rendering const properties, generating standard const fields instead:

public const string EventType = "OnEntryStarted";

Testing

• Added a new snapshot test should generate a const string with autoImplementedProperties to CSharpGenerator.spec.ts
• All 9 C# test suites passing (72/72 tests passed)

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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