How To assign Values to Interface Variables with Interface Datatype

Can any body help me in implementing the below interface, Your prompt response would be appreciated.

public interface IApple
{
IApple Brand { get; }
string Name { get; }
}

This is what i tried to implement

public class AppleChild :IApple 
{

      private string _name;
      private string _brand;
      public AppleChild()
 {
    _brand = "sad";
    _name = "adsa";


   }
  IApple IApple.Brand => _brand; --getting error here it says Cannot convert type string 
to IApple
  string IApple.Name {
   get
   {
       return _name;
   }
   }