How to make generic function that return int or date or string

I need to realize a function which return an Expression<Func<MyObject, T>>, where T could be an integer, a string or a datetime. The caller won't know the type of T. What I want to achieve is a function which create a predicate that can be used in a Linq OrderBy function. The should be something like:

class FilterCreator {
   ...
   Expression<Func<MyObject, T>> getOrderExpression()
   {
   ...
   }
}

class Consumer{
   void mymethod()
   {
      var orderedL开发者_JAVA技巧ist = MyList.OrderBy(filterCreator.getOrderExpression());
   }
}

Generics don't work that way. You would have to either make the caller know the type of T or replace T with Object.