Worked on the dotnet/diagnostics repository to deliver Wasm debugging support by building a WasmFileKeyGenerator for symbol server indexing. This component parses WebAssembly headers and extracts build IDs from custom sections, enabling accurate differentiation between stripped modules and their corresponding symbol files. The generator was integrated into the existing key generation and detection pipeline, laying the foundation for robust split-debug Wasm workflows and future parity with ELF symbol handling. Comprehensive unit tests were developed in C# to validate scenarios involving plain Wasm modules, symbol files, and files lacking build IDs, demonstrating a focus on backend development and reliable test coverage.