How to define Helper Class with generics and inheritance?

Question

I'm trying to setup an helper class, that based on generics, should call methods in generic class type:

static class Helper<T> where T : IWorkingPhase
{

}

interface IWorkingPhase
{
   GetListViewModel();
}

abstract class BaseWorkingPhase: IWorkingPhase
{
   public abstract GetListViewModel()
   {
  
   }
}

class PhaseA : BaseWorkingPhase
{
   public override GetListViewModel()
   {
  
   }
}

class PhaseB : BaseWorkingPhase
{
   public override GetListViewModel()
   {
  
   }
}

What i'm trying to achieve is some similar to:

var a = Helper<PhaseB>.GetListViewModel();

How should i configure this all?

I was thinking of linking the generic with 'new()', but is this correct for a hypothetical future use of dependency injection?

Or should i set as static the "GetListViewModel" method, in the classes?

Answer 1

It looks like you are looking for:

static class Helper<T> where T : class, BaseWorkingPhase, new()

Or:

static class Helper<T> where T : BaseWorkingPhase