How to call generic method by class name as a type [duplicate]

This question already has an answer here:

• How to use reflection to call generic Method? 6 answers

How to call generic method by class name as a type?

Example:

public class WorkItem
 {
    public T GetById<T>(int id) where T : Dto
    {
        ...
    }
 }

It is easy to call: workItem.GetById(1);

But I need to call this method with known name "CoolDto", is it possible?

I was trying

var t = assembly.GetType(Namespace + dtoName);
workItem<t>.GetById(1);

But it doesn't work. Please advice me.