Transparent method {0} is a member of security critical type {1}. Since this method will not have access to its own instance ...

Transparent method {0} is a member of security critical type {1}.  Since this method will not have access to its own instance reference due to transparency rules, this method must either become static, security critical or security safe-critical.   Alternately, the type containing the method could become security transparent or security safe-critical.