title: How do I convert from 8 bit byte to 7 bit byte (Base 256 to Base 128)
body: <p>How do I convert from 8 bit byte to 7 bit byte (Base 256 to Base 128)</p>
  
  <p>I am looking to do something like this:</p>
  
  <pre><code>public string BytesToString(byte[] in)
  {
  
  }
  
  public byte[] StringToBytes(string in)
  {
  
  }
  </code></pre>
  
  <p>I know base64 is available but it expands a byte array too much.</p>