Collection_ Introduction default constructor rule_accessing methods from object returned from property, C#

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//Title of this code
//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class MyClass
    {
     
        
        private string _Field1;
        public MyClass():this("Hi Rextester!!!"){}
        public MyClass(string s)
        {
            _Field1=s;
        }
        public string PropertyOne
        {
            get{return _Field1;}
            set{_Field1=value;}
        }
        
    }
    public class GenericFactory<T>where T:new()
    {
        public static GenericFactory<T> factory;
        public static GenericFactory<T> Instance
        {
            get
            {
                if(factory!=null)
                    return factory;
                else
                {
                    factory=new GenericFactory<T>();
                    return factory;
                }
                
            }
        }
        
        public T NewObject()
        {
         return new T();   
        }
    }
    
    
    
    
    
    
    public class Program
    {
        public static void Main(string[] args)
        {
            MyClass mc1=GenericFactory<MyClass>.Instance.NewObject();
            MyClass mc2=GenericFactory<MyClass>.Instance.NewObject();
             MyClass mc3=GenericFactory<MyClass>
            Console.WriteLine(mc1.PropertyOne);
            Console.WriteLine(mc2.PropertyOne);
            Console.WriteLine("------------------------------------------------");
            mc1.PropertyOne="Different Rextester";
             Console.WriteLine(mc1.PropertyOne);
             Console.WriteLine(mc2.PropertyOne);
            
        
        
        
        }
    }
}

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Collection_ Introduction default constructor rule_accessing methods fr...