如何忽略实体框架查询上的条件？

var result = dbContext.Users.Where(u => u.Name == "").ToList();

var query = dbContext.Users.AsQueryable();

if (shouldApplyCondition)
{
    query = query.Where(u => u.Age > 18);
}

var result = query.ToList();

public static IQueryable<User> FilterByAge(this IQueryable<User> query, int age)
{
    if (age > 0)
    {
        query = query.Where(u => u.Age == age);
    }

    return query;
}

// 使用扩展方法
var result = dbContext.Users.FilterByAge(0).ToList();