我怎么才能在不检查空值的情况下编写我的IEqualityComparer呢？

using System;
using System.Collections;

public class MyObject
{
    public int Id { get; set; }
    public string Name { get; set; }
}

public class MyObjectComparer : IEqualityComparer<MyObject>
{
    public bool Equals(MyObject x, MyObject y)
    {
        // 如果两个对象都为null，则认为它们相等
        if (x == null && y == null) return true;
        
        // 如果其中一个对象为null，则认为它们不相等
        if (x == null || y == null) return false;
        
        // 比较对象的属性
        return x.Id == y.Id && string.Equals(x.Name, y.Name, StringComparison.OrdinalIgnoreCase);
    }

    public int GetHashCode(MyObject obj)
    {
        // 如果对象为null，则返回一个默认的哈希码
        if (obj == null) return 0;
        
        // 使用对象的属性计算哈希码
        int hash = 17;
        hash = hash * 23 + obj.Id.GetHashCode();
        hash = hash * 23 + (obj.Name != null ? obj.Name.GetHashCode() : 0);
        return hash;
    }
}

class Program
{
    static void Main()
    {
        var list = new ArrayList();
        list.Add(new MyObject { Id = 1, Name = "Alice" });
        list.Add(new MyObject { Id = 2, Name = "Bob" });
        list.Add(null);

        var comparer = new MyObjectComparer();
        var itemToFind = new MyObject { Id = 1, Name = "Alice" };

        foreach (var item in list)
        {
            if (comparer.Equals(item, itemToFind))
            {
                Console.WriteLine("Found!");
                break;
            }
        }
    }
}