c# 4.0 - Is there a way to new a class that's the same type as another class without directly specifying it -

i have extension method this

public static void dostuff(this objectcontext context) {     using(var newcontext = new myentitiescontext())     {         // stuff         newcontext.savechanges();     }     context.savechanges(); } 

i wondering if there way new context of same type context passed in instead of specifying myentitiescontext?

thanks in advance

if don't mind reflection:

var context = activator.createinstance(context.gettype()); 

now either need base type or - if still don't mind reflection - can call method name. or, since using c#4 go dynamic.

edit: go way:

public static void dostuff<t>(this t context) t : objectcontext, new() {     using(var newcontext = new t())     {          // stuff         newcontext.savechanges();     }     context.savechanges(); }