yes definately php and mysql are not that much in demand as compared to .Net .....but it gives u an oppurtunity to enhance your skill set . Though later on you can definately change your line from php to .net ...and as it is mysql is always going to be handy whether in php , java or .net .....so according to me try doing work here , if u start njoying it continue with the same and if not then u can switch to .net after a few months