FastText C-style bindings for .NET

FastTextWrapper.cs

public static class FastTextWrapper
{
    [return: MarshalAs(UnmanagedType.Bool)]
    [UnmanagedFunctionPointer(callingConvention: CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
    public delegate bool FastTextNNCallback(StringBuilder word, Single score, IntPtr data);

    [DllImport(dllName: "fasttext.dll", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool fasttext_new(out IntPtr ft);

    [DllImport(dllName: "fasttext.dll", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool fasttext_release(IntPtr ft);

    [DllImport(dllName: "fasttext.dll", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool fasttext_nn2(IntPtr ft, IntPtr mx, string[] positive, string[] negative, int count, FastTextNNCallback callback, IntPtr data);
}