Unity : How to read Binary File Until The End of it (size not written inside file )?

ReadingBinFileUntilTheEnd.cs

private void ReadBinFile(string path, System.Action<Vector3, float> f)
    {
        if (!File.Exists(path)) //if file does not exist we will not try reading it
        {
            return;
        }

        BinaryReader br;

        //reading from the file
        try
        {
            br = new BinaryReader(new FileStream(path, FileMode.Open));
        }
        catch (IOException e)
        {
            Debug.Log(e.Message + "\n Cannot open file.");
            return;
        }

        try
        {

            while (br.BaseStream.Position != br.BaseStream.Length)
            {
                float x = br.ReadSingle();
                float y = br.ReadSingle();
                float z = br.ReadSingle();
                float radij = br.ReadSingle();
                int second = br.ReadInt32();

                f(new Vector3(x, y, z), radij);
            }

        }
        catch (IOException e)
        {
            Debug.Log(e.Message + "\n Cannot read from file.");
            return;
        }
        br.Close();
}