如何使用 LINQ 计算列表中的记录中出现数字的次数

Question

I have a list:

public static List<PhraseSource> phraseSources;

The list has property:

public int? JishoJlpt     { get; set; }

Can anyone tell me how I can get a count of each of the different values of JishoJlpt using LINQ?

Answer 1

phraseSources.GroupBy(p => p.JishoJlpt)
    .Select(g => new { JishoJlpt: g.Key, Count: g.Count() });