MissionPlanner.srtm.readFile C# (CSharp) Method

        static MemoryStream readFile(string filename)
        {
            if (filecache.ContainsKey(filename))
            {
                return (MemoryStream) filecache[filename];
            }
            else
            {
                FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read);

                byte[] file = new byte[fs.Length];
                fs.Read(file, 0, (int) fs.Length);

                filecache[filename] = new MemoryStream(file);

                fs.Close();

                return (MemoryStream) filecache[filename];
            }
        }