Crm 2015 custom action not fired plug in -

i new in crm dynamics 2015. try create custom action. in firs step create action in "process" in crm interface. after create project in visual studio class library.i implement ipugin interface. registrated plug in on "message" called custom action name in "process". when try use it don't work. run plug in in debug mode check if plug called not

renjith answered correctly. should use codeactivity not iplugin interface derived class. here libraries might out:

• https://msdn.microsoft.com/en-us/library/gg328515.aspx

• https://msdn.microsoft.com/en-us/library/dn481600.aspx