UseExtensionMethod for CodeRush provides an additional Refactoring 'Use Extension Method'

This Refactoring is present when the caret resides on a method call which could be called as an extension method.

For example

Given a simple extension method...

...and a simple call to that method....

Place your caret on the method call and hit your CodeRush \ Refactor key (Defaults to Ctrl+`)

Then choose Use Extension Method from the menu.

...Your original call will be replaced with...

This plugin requires CodeRush. You can locate a free trial of CodeRush here.