如何编写自己的 LINQ 提供程序来查询某些自定义存储？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;

public class CustomStorageProvider<T> : IQueryable<T>
{
    public CustomStorageProvider()
    {
        Expression = Expression.Constant(this);
    }

    public Type ElementType => typeof(T);

    public Expression Expression { get; }

    public IQueryProvider Provider => new CustomStorageProvider<T>();

    public IEnumerator<T> GetEnumerator()
    {
        // 在此处实现自定义存储的查询逻辑。
    }

    System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
    {
        return GetEnumerator();
    }
}

var query = from item in new CustomStorageProvider<Item>()
            where item.Property == "Value"
            select item;