IIS url rewrite rewriting all .asp to .html
- by user335711
I need to create rules for web.config that will rewrite all requests for files with extension .html to .asp and redirect all .asp requests to .html
Example:
file_xyz.asp rewrites to file_xyz.html 
directory1/file_xyz.asp rewrites to directory1/file_xyz.html 
and 
file_xyz.html  redirects to file_xyz.asp 
directory1/file_xyz.html redirects to directory1/file_xyz.asp
What is the syntax for the rule
Is this too broad a rule?  If I should need for what ever reason to have a physical file such as file_abc.html how do I exclude it from the redirect rule? 
I am thinking I should just use ISAPI_Rewrite http://www.isapirewrite.com/ there seems to be a ton of resources out there for rewriting with htaccess and very little online help for using IIS 7 URL rewrite. Any thoughts and/or advice
Thanks in advance