C# (CSharp) UserInGroups.ToListの例

コード例 #1

 public List <string> UsersByGroup(int id) =>
 (from user in UserInGroups.ToList() where user.GroupId == id select user.UserName).ToList();

コード例 #2

 private List <int> GroupIdByUser(string name) =>
 (from item in UserInGroups.ToList() where item.UserName == name select item.GroupId).ToList();