No, it's C++, based on LLVM. https://github.com/microsoft/DirectXShaderCompiler https://github.com/microsoft/DirectXShaderCompiler Edit: apparently dxil.dll is

No, it's C++, based on LLVM. https://github.com/microsoft/DirectXShaderCompiler https://github.com/microsoft/DirectXShaderCompiler Edit: apparently dxil.dll is not part of DXC (the classic move to make "open source" software dependent on external proprietary garbage, apparently.) But I'd still doubt it's a managed DLL.