Converting a binary string to an int in C#

Back in my previous post, Converting an int to a binary string [http://davidzych.com/2013/12/06/converting-an-int-to-a-binary-string-in-c/], we looked at how to write out the bits of an int without using the existing Convert.ToString [http://msdn.microsoft.com/en-us/library/14kwkz77%28v=vs.110%29.aspx] method