Error " object A get or set accessor expected "

I try everything I can't fix this error , can somebody help me please.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace Strategy.Buy
{
    class Class1
    {
        int Buy{get;set;}
 
           public struct strategy
                {
                    // public field
                    public class Buy
                    {
                    public override bool Buy
                    {
                 object Strategy.Buy
                    {
                        get
                    {
                        return _buy[_position]
                    }
                  }
                    Buy object1 = obj as Buy;
                       if (M2 > M0)
                  {
                       return true;
                    }
                       object. Buy = 1 ("contract next bar at Market");
                       return Buy ;("object = Buy 1 contract next bar at Market");    
                    }
                }
           }
    }
}