C＃LINQ多个数组到简单对象列表

Question

I have an array of objects List<SlovnikWords> , here is the model:

class SlovnikWord
{
    public int Id { get; set; } = -1;
    public string Title { get; set; }
    public string Description { get; set; }
    public List<Word> Forms { get; set; }
    ...
}

And the model for Word is as follows

class Word
{
    public int Id { get; set; } = -1;
    public string Title { get; set; }
    public string Description { get; set; }
    ...
}

I need to create a list of all the Forms from all the original list of SlovnikWords , here's what I came up with:

var q = SlovnikData.Select(x => x.Forms);

This unfortunately creates an array of arrays, where as I only need one dimensional array of Forms without the outer one, ie a compound of x.Forms , please help.

Answer 1

应该这样做：

var q = SlovnikData.SelectMany(x => x.Forms);