Without having to use System.Resources.ResourceReader, it is possible to read .resources files outside of Visual Studio.
http://fishcodelib.com/Resource.htm
http://fishcodelib.com/Resource.htm
The program linked above can extract .wav files from C# or Visual Basic .resource files, however they may be in the form as a "System.IO.PinnedBufferMemoryStream" file.
Exacting them is as simple as clicking on the ellipsis (which appears on the right hand side after you've selected the "System.IO.PinnedBufferMemoryStream" file on the list) and selecting "Save As" on the window that appears.
Exacting them is as simple as clicking on the ellipsis (which appears on the right hand side after you've selected the "System.IO.PinnedBufferMemoryStream" file on the list) and selecting "Save As" on the window that appears.