title: Free analogue of the PostSharp required
body: <p>I have heard of PostSharp, but I am wondering if there are any other similar tools - anything analogous to PostSharp?</p>
  
  <p>Are there any libraries that could be used as an alternative to PostSharp? Any other tools that can post-process an assembly and inject code based on attributes? </p>
  
  <p>Any free and/or open source alternatives to PostSharp would be especially interesting.</p>
  
  <p>Thank you.</p>