对3个列表上的嵌套属性进行排序

Question

如何将嵌套列表排序到位：

JobCollection清单

职位清单（按字符串发起人排序）

项目清单（按int顺序排序）

数据模型的类结构：

public class JobCollection
{
        public string Collection { get; set; }

        public virtual TrulyObservableCollection<Job> Jobs { get; private set; } = new TrulyObservableCollection<Job>();
}

public class Job
{
        public virtual JobCollection JobCollection { get; set; }

        public string JobGUID { get; set; } = Guid.NewGuid().ToString();

        public string Sponsor { get; set; }

        public virtual TrulyObservableCollection<Item> Items { get; private set; } = new TrulyObservableCollection<Item>();

}
public class Item
{
        public virtual Job Job { get; set; }

        [Key]
        public string ItemGUID { get; set; } = Guid.NewGuid().ToString();

        public int Order { get; set; }
}

我已经尝试了各种方法，但没有取得任何进展，例如：

EntireCollection.SelectMany(o => o.Jobs).ToList().ForEach(d => d.Sponsor = d.Items.OrderBy(e => e.Order).ToList());

elem => elem.Jobs.OrderBy(
job => job.Items.OrderBy(
    item => item.Order
)

Argh!

Answer 1

最简单的方法，但不建议使用。

jobCollection.ForEach( (jobCol) => 
    { 
        jobCol.Jobs.ForEach( (job) => 
        {
            job.Items.OrderBy( item => item.Order );
        });
        jobCol.Jobs.OrderBy( (job) => job.Sponsor );
    });