How to create custom strips, buttons for content editor from asp.net project

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/"><sitecore><contentEditor><ribbons><strip id="CustomStrip" title="Custom Strip"><chunks><chunk id="CustomChunk" title="Custom Chunk"><buttons><button id="CustomButton" header="Custom Button" click="javascript:alert('Custom Button Clicked');" icon="Applications/32x32/bullet_blue.png" /></buttons></chunk></chunks></strip></ribbons></contentEditor></sitecore></configuration>

I am writing a plugin for the Content Editor. I placed this code in the App_Config\Include folder and named it Ribbon.config. I want to create custom elements (strip, chunk, button) on the Content Editor toolbar from an ASP.NET project, but I didn't get any result. Am I doing everything correctly?