How can I add png images when I create a plugin?

I am developing a plugin for xamarin.I need to add the images to the plugin.There are several images which I will be able to add.How can I do this?.Those images are relevant to xaml pages which I gonna implement through plugin.please can anyone have an idea.I have tried lot of methods.firstly i made a class library but I could not add this images properly.Therefore I start to create a plugin.