How to call the overloaded constructor in the base class and use the class properties in the child class?

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C#

constructor

I have a parent base class which has an overloaded constructor that creates the instances of another class "GlobalParameters" where I have some common properties I use.

public class base 
{
   public base()
  {
    

  }

  public base(GlobalParameters global)
 {

    global = (GlobalParameters )Activator.CreateInstance(typeof(GlobalParameters ));

 }

}

//here is my GlobalParameters class
public class GlobalParameters()
{
   public string name {get; set;}
   public int age {get; set;)


}

//here is the child class where I want to call the overloaded constructor and use the properties I have in my "GlobalParameters" class

public void ChildClass : Base
{

     //how to call the overload Base constructor and use the global parameter to access those class 
    properties like name and age
    

}

What I have tried:

public base(GlobalParameters global) : this()
 {

    global = (GlobalParameters )Activator.CreateInstance(typeof(GlobalParameters ));

 }

but now how can I call it in the Base class??