Get a file from the project resources.

MainVM.cs

using (Stream stream = this.GetType().Assembly.GetManifestResourceStream("App.Resources." + "File.ext"))
{
  if (stream == null)
  {
      throw new ArgumentException("No such resource", "File.ext");
  }
  using (Stream output = File.OpenWrite(currentAnalysisPath + $@"\Resources\File.ext"))
  {
      stream.CopyTo(output);
  }
}