使用 Linq 从复杂的 object 中提取不同的对象

Question

I have a collection that contains a list of complex objects, "SubCategory". SubCategory contains "Category".

I can iterate through my collection and see all object, and drill down through to Category.

How can I, using Linq, extract a distinct list of Categories?

I initially tried this in a foreach loop:

if (!categoryList.Contains(baseline.ContentCategory)
{
    categoryList.Add(baseline.ContentCategory);
}

But that just does not work, and I think a Linq solution would be more elegant.

Thanks.

Answer 1

subCategoryList.Select(s => s.Category).Distinct()