Write DLL resource to file

Assembly assembly = Assembly.GetExecutingAssembly();
// IMPORTANT:
//   * Resource names must be qualified with the assembly's namespace
//   * Resource's build action is "Embedded Resource"
Stream resStream = assembly.GetManifestResourceStream("MyNamespace.myres.txt");
using (Stream file = File.OpenWrite("mydest.txt")) {
  resStream.CopyTo(file);
}