NRefactory , move method

Question

I am trying to use NRefactory for my refactorings, I have an old style code written in non OOP style

the thing I need to do is for each class T move static methods accepting T as first parameter type into a new class ExtensionsForT and change references to it look like X.method1(t)=>t.method1()

//------------------original-------------------------------------------
class BigClass{
   //method is referenced here
   public BigClass(){
       Reader r=new Reader();
       //...
       Next(r);
   }

   //method to refactor
   public static bool Next( Reader r){
       //...
   }

}


//-------------------- want to achieve this-------------------------
class BigClass{
   //method is referenced here
   public BigClass(){
       Reader r=new Reader();
       //...
       r.Next();
   }

}

public class ReaderExtensions{
    //method to refactor
   public static bool Next(this Reader r){
       //...
   }
}